Geometry Crossword Puzzle

The sum of the areas of all faces on a 3D shape. Formula=ph+2B
A triangle with all same sides. Also all angles equal.
a straight line extending from the center of a circle to the circumference. Half of the diameter.
The intersection point of two sides of a plane figure.
Two lines which cross to form 90 degree angles.
A 90 degree angle.
A triangle having three unequal sides and angles.
An angle less than 90 degrees. It has to be greater than 0 degrees.
The line segment between two points on a given curve of a circle.
One part of a line. It has 2 points at each end.
It keeps going on forever with 2 arrows at each end.
A position in space or on a graph
A quadrilateral having both pairs of opposite sides parallel to each other. Can be a square or rectangle.
The part of a straight line considered as originating at a point on the line and as extending in one direction from that point.
A triangle which has two sides equal and the third side is not equal.
A straight line passing through the center of a circle and meeting the circumference at each end.
An angle greater than 90 degrees but less than 180 degrees.
A portion of a circles circumference that is round.
Either of two equal and opposite angles formed by the intersection of two straight lines.
A ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle.