Geometry

2. an angle measuring 90 degrees
3. the figure formed by two rays meeting at a common endpoint.
4. side,angle,side
6. an angle measuring more than 90 angles
9. a straight one-dimensional figure having no thickness and extending infinitely in both directions.
10. angle,side,angle
12. line segment joining a vertex to the midpoint of the opposite side, thus bisecting that side.
15. an individual location or object on a map and is associated with a specific grid reference.

1. if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.
3. angle,side,side
5. the angle, inclination, steepness, or gradient of a straight line.
7. side,side,side
8. a flat surface of two dimensions.
11. a line with a single endpoint (or point of origin) that extends infinitely in one direction.
13. an angle measuring less than 90 degrees.
14. The ratio of the length of the side opposite an acute angle in a right triangle to the length of the hypotenuse.