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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

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- Crossword Puzzle

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

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- Crossword Puzzle

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 four-sided polygon. Quadrilateral

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

A four-sided polygon. Quadrilateral

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- Crossword Puzzle

a triangle that has all equal sides and anles is considered an __________ triangle. Name starts with an "e" equilateral

a triangle with no congruent sides. Name starts with an "s". scalene

In this triangle, it has 2 congruent sides. Name starts with an "i". isosceles

coplainar lines that do not intersect. Lines never end. parallel

when the y-axis and x-axis change by a ratio. Many graphs have this type of diagonal. slope

transformation that turns every point. makes a figure move 360 degrees among a point is called _________. Name starts with an "r". rotation

a transformation representing a flip.When a figure flips over the or x-axis it is called a _________. reflection

a transformation that slides a figure. This word starts with a "t" translation

this angle is more than 90 degrees. This angle starts with an "o". obtuse

in a polygon, a segment that connects nonconsecutive vertices of the polygon. Line is neither horizontal nor vertical. diagonal

a quadrilateral with parallel opposite sides. Any sides can be called a base. (square,rhombus,rectangle) parallelogram

a quadrilateral with 4 right angles. Considered a parallelogram. rectangle

a quadrilateral with 4 congruent sides. considered a parallelogram. rhombus

a quadrilateral with 4 right angles and 4 congruent sides, Considered a parallelogram. square

a quadrilateral with one pair of parallel sides. Two base angles. trapezoid

this angle is less than 90 degrees. Angle starts with an "a" acute

a transformation that enlarges or reduces the original figure. Gets smaller or bigger. dilation

a __________ angle forms a perfect 90 degrees. Angle name starts with a "r" right

common endpoints of a figure. The "points" vertex

all figures have one of theses. The ________ encloses a figure. Word starts with a "s" side

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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 90Â° 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

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A line that intersects 2 or more coplanar lines. Transversal

Angles on the same side of the transversal that lie in the same exact spot. Corresponding Angles

The starting and stopping points of a line segment. Endpoints

Two angles that form a line. Linear Pair

Two angles that add up to 180 degrees. Supplementary

Two angles that add up to 90 degrees. Complementary

An angle that measures exactly 90 degrees. Right Angle

An angle that measures greater than 90 degrees and less than 180 degrees. Obtuse Angle

An angle that measures less than 90 degrees. Acute Angle

The point 2 or more figures have in common. Intersection

The point in the exact middle of a line segment. Midpoint

Angles with the same measure. Congruent Angles

Divide into 2 equal pieces. Bisect

On the same line. Collinear

On the same plane. Coplanar

Non-coplanar lines that do not intersect. Skew

Lines that intersect to make a 90 degree angle. Perpendicular Lines

Coplanar lines that never intersect. Parallel Lines

Angles on the same side of the transversal and on the interior of the lines. Consecutive Interior

Angles on opposite sides of the transversal and on the outside of the lines. Alternate Exterior

Angles on opposite sides of the transversal and on the inside of the lines. Alternate Interior

Angles on the same side of the transversal that lie in the same exact spot. Corresponding

A line that intersects 2 or more coplanar lines. Transversal

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- Crossword Puzzle

A portion of a circle defined by two endpoints arc

A segment with endpoints at the center and on the circle radius

A segment with endpoints on the circle chord

An irrational number =C/d pi

Set of points in a plane equidistant from the center circle

A line in the same plane as the circle which intersects the circle in exactly on point tangent

When every side of the polygon is tangent to the circle circumscribedpolygons

A chord that passes through the center diameter

Region bounded by an arc and a chord segmentofcircle

Region bounded by a central angle and its intercepts arc sectorofcircle

An arc greater than 180 degrees majorarc

Arc formed by an inscribed angle interceptedarc

When all vertices of a polygon lie on the circle inscribed

When two circles have congruent radii congruent

A line that intersects a circle in exactly two points secant

Has a vertex on a circle and sides that contains cords of a circle inscribedangle

Point where a tangent line touches a circle pointoftangency

A segment of a secant line that has exactly one endpoint on the circle secantsegment

A secant segment that lies in the exterior of the circle externalsecantsegment

Segment of a tangent with one endpoint on the circle tangentsegment

Arcs in a circle that have exactly one point in common adjacentarcs

Line, ray, or segment this is tangent to two circles in the same plane commontangent

Arcs with the same measurement congruentarcs

An arc equal to 180 degrees semicircle

Two segments created by two chords intersecting in a circle chordsegment

When circles are coplanar and have the same center concentric

An arc less than 180 degress minorarc

An angle with the vertex in the center of the circle centralangle

A circle is ________ about a polygon if it contains all vertices of that polygon circumscribed

Distance between two endpoints along an arc measured in linear units arclength

Distance around a circle circumference

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- Crossword Puzzle

polygon with three sides triangle

polygon with five sides pentagon

polygon with eight sides octagon

polygon with ten sides decagon

a triangle with an angle with 90 degrees right

triangle with an angle of greater than 90 degrees obtuse

a square, rectangle and rhombus are always this parallelogram

Lines that never touch and always the same distance apart parallel

lines that intersect perpendicular

triangle with three congruent sides equilateral

triangle with zero congruent sides scalene

same or equal length congruent

polygon with all sides and angles congruent regular

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- Crossword Puzzle

Part of a line that has one end point and extends indefinitely in one direction. Ray

A pair of non-adjacent angles formed when two lines intersect. Vertical

Two angles which share a common side and vertex but have no common interior points (they do not overlap). Adjacent

A point that divides a segment into two congruent segments. Midpoint

An angle whose measure is 90 degrees. Right

Part of a line with two endpoints. Line Segment

Two angles with measures that have a sum of 180 degrees. Supplementary

An angle whose measure is 180 degrees. Straight

A pair of adjacent angles with non-common sides that are opposite rays. Linear Pair

A point, line, ray, or segment that divides a segment or angle into two congruent pieces. Bisector

Two angles with measures that have a sum of 90 degrees. Complementary

An angle whose measure is less than 90 degrees Acute

An angle whose measure is greater than 90. Obtuse

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- Crossword Puzzle

A polygon with 4 sides quadrilateral

Angles made by perpendicular lines right angles

Triangle with all angles less than 90 degrees Acute

Polygon with sides of equal length Equilateral

Polygon with angles of equal measure Equiangular

Polygon with sides of equal length and angles of equal measure Regular Polygon

Triangle with one angle measure greater than 90 degrees Obtuse

Triangle with sides of different lengths scalene

Triangle that has at least two sides of equal length Isosceles

Equilateral parallelogram Rhombus

Parallelogram with four right angles rectangle

Quadrilateral that has exactly two parallel sides trapezoid

Quadrilateral that has two pairs of parallel sides parallelogram

Special kind of geometric figure Polygon

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- Crossword Puzzle

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