Geometry

4. A triangle with two sides of equal length.
6. A triangle in which all three sides have the same length
10. A logical argument in which each statement you make is supported by a statement that is accepted as true.
11. Either of two angles whose sum is 180°
12. Either of two angles whose sum is 90°.
14. Chord that passes through the center of the circle.
15. The angles which occupy the same relative position at each intersection where a straight line crosses two others.

1. The act of expanding or enlarging or the state of being expanded or enlarged.
2. Two lines are parallel if they are coplanar and do not intersect.
3. Every angle, every line, and every figure/shape is congruent to itself.
5. Segment joining the two base planes and perpendicular to both.
7. Part of a line that consists of two points called endpoints and all points between them.
8. Either of a pair of angles that have the same vertex and are on opposite sides of two intersecting straight lines.
9. A geometric transformation that moves every point of a figure, shape or space by the same distance in a given direction.
13. Segment whose endpoints are the center of the circle and a point on the circle.