Geometry Extra Credit

2. the perimeter of a circle
3. a line segment from a circle's center to its perimeter
5. two lines that meet at a right angle
10. the theorem that states a^2 + b^2 = c^2
13. an angle formed by two chords that share a common end point on a circle
15. angles that add up to 180°
16. any line segment that passes through the center of a circle and whose endpoints lie on the circle
17. two lines on the same plane that never intersect
18. an angle whose measure is greater than 90 degrees and less than 180 degrees
20. any four sided figure
22. when two ratios are equal
23. a line that touches a circle at just one point
24. a parallelogram with four equal sides

1. the distance around a 2D shape
3. a mnemonic for finding the slope of a line
4. the longest side of a right triangle
6. a triangle where no sides are equal
7. a mnemonic for sin, cos, and tan ratios
8. an arc of a circle that measures 180°
9. a line that divides something into two equal parts
11. a line segment that connects the midpoints of two sides of a triangle or a trapezoid
12. angles that add up to 90°
14. an angle whose measure is less than 90 degrees
19. the ratio of a side on one figure to the corresponding side on another figure
21. a line segment whose endpoints are points on a circle