geometry

6. Two angles that measure 90 degrees
8. SinA/a=sinB/b=sinceC/c
9. The amount each side of a figure is proportionally enlarged or reduced in size
11. Opposite/hypotenuse
12. A point that divides a line segment into two parts of equal length
13. A transformation that maintains the shape of a figure but multiplies its dimensions by a chosen factor
14. Adjacent/hypotenuse
17. A^2+b^2=c^2
20. Formed by two radii of a central angle and the arc between their endpoints on the circle

1. Two angles that measure 180 degrees
2. A rigid transformation that involves flipping a figure over the line of reflection
3. Opposite angles of intersecting lines are equal
4. Opposite/adjacent
5. The distance around a 2-dimensional object's exterior
7. C^2=a^2+b^2-2abcos(C)
10. A rigid transformation that involved sliding a figure to a new location
15. A rigid transformation that involves turning an entire figure about a fixed point
16. Two-dimensional closed figure made up of straight line segments connected end-to-end
18. Set of points a fixed distance from a center and is defined by a central angle
19. The number of square units needed to fill up a region on a flat surface