# Geometry Crossword

Type
Crossword
Description

Reversing "if" and "then" in a statement Converse
When ~ if means ~ then inverse
Statements that don't need proof & are accepted as true postulate
A statement that can be proven theorem
Formed by 2 lines & found at the vertex angle
A figure that goes on forever & is not defined line
A location point
A line that goes on in 1 direction ray
Angle smaller than 90 degrees acute
Angle equal to 90 degrees right
The line that passes through 2 or more parallel lines transversal
The point in the middle of a line midpoint
The measure of a surrounding area perimeter
Space taken up by a figure area
A quadralateral whose sides can be grouped to 2 equal pairs kite
A quadralateral with 4 equal sides, 2 obtuse angles & 2 acute angles rhombus
A quadrilateral whose angles all equal 90 degrees and sides are all the same length square
Point of concurrency in a triangle centroid
The point of the triangle where the distance to each side is equal incenter
2 Shapes having equal angles and corresponding sides similarity

## Trigonometry Crossword

Type
Crossword
Description

Always opposite of the right angle of the right triangle Hypotenuse
Will always makeup part of the angle that is being discussed and not be the hypotenuse Adjacent Side
Will never form part of the angle being discussed Opposite side
Opposite/Hypotenuse Sine
A triangle with a right angle Right triangle
A special right triangle with two congruent angle 45-45-90 Triangle
Two sides with with equal lengths Isosceles Triangle
Special right triangle that uses the ratio 1:Radical of 3:2 30-60-90 Triangle
a^2+b^2=c^2 Pythagorean Therom
Angle that is always 90 degrees Right Angle
A plane figure with three straight sides and three angles Triangle
Branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant function of any angles Trigonometry
Identical in form, size and angles Congruent
Inverse of sin Sin^-1
Inverse of Cosine Cos^-1
Inverse of Tangent Tan^-1
The angle sum of a triangle 180 Degrees
Is used to show which lines are parallel \
If all sides are the same on both of the triangle then they are congruent SSS Postulate
If two sides and the angle between them are the same then they are congruent SAS Postulate
Another word for height Altitude
In a triangle it is the line segment drawn from a vertex to the midpoint Median
If two angles are the same for two triangle then they are the same AA Postulate

## Geometry Vocabulary Crossword

Type
Crossword
Description

A closed plane figure formed by three or more straight sides that are line segments. polygon
A polygon with three sides and three angles. triangle
A polygon with four sides and four angles. quadrilateral
A polygon with five sides and five angles. pentagon
A polygon with six sides and six angles. hexagon
A polygon with seven sides and seven angles. heptagon
A polygon with eight sides and eight angles. octagon
A polygon with nine sides and nine angles. nonagon
A polygon with ten sides and ten angles. decagon
An angle that measures greater than 0 degrees and less than 90 degrees. acute
An angle that forms a square corner and has a measure of 90 degrees. right
An angle whose measure is 180 degrees. straight
An angle that measures greater than 90 degrees and less than 180 degrees. obtuse
An exact location in space. point
A straight path of points in a plane that continues without end in both direcetions with NO endpoints. line
A part of a line that includes two points called endpoints and all the points between them. line segment
A part of a line; it has one endpoint and continues without end in one direction. ray
The point at either end of a line segment of the starting point of a ray. endpoint
Lines in the same plane that never intersect and are always the same distance apart. parallel
Two lines that intersect to form four right angles. perpendicular
Lines that cross each other at exactly one point. intersecting
The number of square units needed to cover a surface. area
The distance around a figure. perimeter
A parallelogram with four equal, or congruent, sides and four right angles. square
A parallelogram with opposite sidees that are equal, or congrudent, and with four right angles. rectangle
A parallelogram with four equal, or congruent, sides. rhombus
A quadrilateral with exactly one pair of parallel sides. trapezoid
A quadrilateral whose opposite sides are parallel and equal, or congruent. parallelogram
Having the EXACT same size and shape. congruent

## Geometry Terms Crossword

Type
Crossword
Description

branch of mathematics that deals with points, lines, planes, and solids and examines their properties geometry
has no size, length, width, or height. represented by a dot and named by a capital letter point
set of all points space
points that lie on the same line collinear points
points that lie on the same plane coplaner points
line that consists of two points and all points between them segment
the part of a line that contains an endpoint and all other points extending in the other direction ray
things measuring to the same size or length congruent
a point that divides a segment into two congruent parts midpoint
angle whose measure is between 0 and 90 degrees acute angle
an angle that measures 90 degrees right angle
an angle whose measure is greater than 90 but less than 180 degrees obtuse angle
an angle whose measure is 180 degrees straight angle
triangle with no sides congruent scalene
triangle that has a right angle included right triangle
two angles whose sum is 90 degrees complementary
two angles whose measures sum up to 180 degrees supplementary
line that intersects a circle in two points secant
segment that connects two ponts on a circle chord
comparison of two numbers by divison ratio
congruent polygons lying in parallel planes bases
equation that sates two ratios are equal proportion
parellelogram with consecutive sides congruent rhombus
four sided figure with all sides congruent square
a line segment with two points on a cirlce that passes through the center diameter

## IED Unit 5 key terms Crossword

Type
Crossword
Description

A triangle that contains only angles that are less than 90 degrees. Acute Triangle
The amount of rotation needed to bring one line or plane into coincidence with another, generally measured in radians or degrees. Angle
The number of square units required to cover a surface. Area
1. An imaginary line through a body, about which it rotates. Axis
A 3D point defining the geometric center of a solid. Centroid
A round plane figure whose boundary consists of points equidistant from the center Circle
1. A triangle located round a polygon such as a circle. Circumscribe
A solid composed of two congruent circles in parallel planes, their interiors, and all the line segments parallel to the axis with endpoints on the two circles. Cylinder
The measure of mass density is a measure of mass per volume. Density
A straight line passing from side to side through the center of a circle or sphere. Diameter
A shape generated by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant and equal to the major axis Ellipse
A curve formed at the interior intersection between two or more surfaces. Fillet
To draw a figure within another so that their boundaries touch but do not intersect. Inscribe
The amount of matter in an object or the quantity of the inertia of the object. Mass
A triangle with one angle that is greater than 90 degrees. Obtuse Triangle
A four-sided polygon with both pairs of opposite sides parallel. Parallelogram
The numerical value of the ratio of the circumference of a circle to its diameter Pi
Any plane figure bounded by straight lines. Polygon
A solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms. Prism
A straight line from the center to the circumference of a circle or sphere. Radius
A parallelogram with 90 degree angles. A square is also a rectangle. Rectangle
A triangle that has a 90 degree angle. Right Triangle
A regular polygon with four equal sides and four 90 degree angles. Square
The squared dimensions of the exterior surface Surface Area
A straight or curved line that intersects a circle or arc at one point only. Tangent
A polygon with three sides. Triangle
The amount of three-dimensional space occupied by an object or enclosed within a container. Volume

## Definitions- Chapter 1 & 2 Crossword

Type
Crossword
Description

An angle whose measure is less than 90 degrees. Acute
An angle whose measure is 90 degrees. Right
An angle whose measure is greater than 90 degrees but less than 180 degrees. Obtuse
An angle whose measure is 180 degrees. Straight
Coplanar angles that have a common side, common vertex, and no common interior points. Adjacent
A line, ray or segment that cuts an angle into two equal angles. Angle Bisector
Points that lie on the same line. Collinear
Points that lie in the same plane. Coplanar
Two angles whose sum is equal to 90 degrees. Complementary
Angles that have equal measure. Congruent Angles
Segments that have equal lengths. Congruent Segments
A drawing that shows a corner view of a 3-D figure that allows you to see the top, front and side of an object in the same drawing. Isometric
A pair of adjacent angles whose non-common sides form a line. Linear Pair
A point on a line segment that divides the segment in to equal lengths. Midpoint
A ________________ bisector is a line ray or segment that is perpendicular to the segment at its midpoint. Perpendicular
Lines that intersect and form right angles. Perpendicular Lines
A statement in geometry that is accepted as fact without proof. Postulate
Part of a line that consists of one endpoint and all points of the line on one side of the endpoint. Ray
Two rays that share the same endpoint and form a line. Opposite Rays
Part of a line that contains two endpoints and all points between them. Segment
A line, ray or segment that which cuts another line segment into equal parts. Segment Bisector
Two angles whose sum is equal to a straight angle or 180 degrees. Supplementary
A pair of angles whose sides form two pairs of opposite rays. Vertical Angles
A statement that is written in if-then form. Conditional
The part of a conditional statement that follows the if. Hypothesis
The part of a conditional statement that follows the then. Conclusion
A statement in geometry that is accepted as fact only after it has been proven. Theorem
____________ reasoning is a process of reasoning logically from given facts to reach a conclusion. Deductive
______________reasoning is a type of reasoning that reaches a conclusion based on a pattern of specific examples or past events to reach a conclusion. Inductive

## Basic Geometric Terms Crossword

Type
Crossword
Description

An angle that measrues 180 degrees. straight
A line that goes up and down vertical
A straight path that has a beginning but not ending. ray
A math tool used for measuring or drawing angles. protractor
The middle point. midpoint
Two rays that have a common end point angle
An angle that measures more than 180 degrees but less than 360. reflex
Two lines that form right angles where they intersect. perpendicular
A straigh path that has a beginning and an ending. segment
An angle that measures more than zero degrees but less than 90. acute
where lines cross over a common point. intersection
Two angles that are next to each other. adjacent
A line that goes from side-to-side. horizontal
Something that has an end. finite
Angles that are opposite each other when two lines intersect. vertical
Two angles whose sum is 180 degrees. supplementary
Two angles whose sum is 90 degrees. complementary
Two lines that never cross or touch. parallel
Never ending. infinite
An angle that measures more than 90 degrees but less than 180. obtuse
As traigh path that goes on infinitely in either direction. line
A point where two angles begin or meet. vertex
When a figure is folded in half and the two halves match perfectly. symmetry
An angle that is 1/4 of a circle. right
A unit used to measure an angle. degree

## Vocabulary: Triangles Crossword

Type
Crossword
Description

opposite side over adjacent side tangent
opposite side over hypotenuse sine
angle less than 90 degrees acute
angle greater than 90 degrees obtuse
a triangle with two equal sides isosceles
a triangle with a 90 degree angle right
a triangle with three equal sides equilateral
a triangle with no equal sides scalene
the study of the relationship between the angles and the sides of a triangle trigonometry
the theorem that relates the three sides of a triangle pythagorean
the side opposite to the right angle hypotenuse
Formula that is for the distance around the shape perimeter
the amount of space within a shape area
In the area formula of a triangle, what does b stand for? base
Measure of the vertical distance height
same size same shape congruent

## A Crossword Puzzle of the Language of Geometry

Type
Crossword
Description

part of a line that is bounded by two distinct end points segment
2 angles that add up to 180 degrees supplementary
exactly similar parts facing each other or around an axis. symmetry
a figure with four equal straight sides and four right angles square
A line with a start point but no end point ray
having a common vertex and a common side adjacent
a figure with three straight sides and three angles triangle
a nine-sided figure nonagon
a transformation in which the figure is reflected across a line, creating a mirror image reflection
a quadrilateral with only one pair of parallel sides trapezoid
at an angle of 90° to a given line perpendicular
each angular point of a polygon vertex
2 angles that add up to 90 degrees complementary
a transformation in which the figure is turned around a fixed center point rotation
a figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square rectangle
A long thin mark made by a pen line
the continuous line forming the boundary of a closed figure perimeter
a figure with at least three straight sides and angles polygon
a seven-sided figure heptagon
the longest side of a right triangle hypotenuse
a transformation in which every point of the figure is moved in the same direction and for the same distance translation
the space between two intersecting lines or surfaces at or close to the point where they meet angle
a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides rhombus
a triangle that has three unequal sides scalene
a transformation in which the figure is enlarged or decreased in size dilation

## Geometry Chapter 1 Vocab Crossword

Type
Crossword
Description

a set of many points that extend in opposite directions without ending line
a two-dimensional flat surface plane
points on the same line collinear
portion or part of a line with an endpoint at each end linesegment
has one endpoint and extends in the other direction with no end ray
a statement about geometric figures accepted as true without proof postulate
a figure made up of two sides, or rays, with a common endpoint angle
the point common to both sides of an angle vertex
a tool used to draw circles and arcs compass
part of a circle arc
to divide into two equal parts bisect
a unit of angle measure degree
a tool used to draw or measure angles protractor
an angle which measures less than 90* acuteangle
anangle which measures 90* rightangle
an angle which measures more than 90* obtuse angle
lines that meet to form right angles perpendicularlines
angles with a common vertex and one common side adjacentangles
two angles whose measure add up to 90* complementaryangles
to meet at a point or to cross or averlap each other intersect
angles that have a common vertex and whose sides are formed by the same lines verticalangles
two angles whose measures add up to 180* suppplementaryangles

## Geometry Terminology Crossword

Type
Crossword
Description

A precise location or place on a line or plane Point
An object that is straight, infinitely long and infinitely thin. Line
A flat surface that is infinitely large Plane
A portion of a line which starts at a point and goes off in a particular direction to infinity Ray
A portion of a line Line Segment
Never touching Parallel
Lines that are not coplanar Skew
Two angles in corresponding positions relative to two lines Corresponding
Lines that cross Interesting
Points all in one plane Coplanar
Points all on one line Collinear
Not all on the same line Non- Collinear
Not all on the same plane non-coplanar
A line meeting at a right angle Perpendicular
A figure formed by two rays that have the same endpoint angle
Equal measures Congruent
Divides the angle into two congruent angles Bisector
Less than 90 degrees Acute
Larger than 90 degrees, less than 180 Obtuse
90 degrees Right
Two angles whose sides form two pairs of opposite rays Vertical
Two angles in a plane that have a common vertex and side, but no common interior points Adjacent
Two angles whose measures have the sum of 90 Complementary
Two angles whose measures have the sum of 180 Supplementary