Discovering Geometry

4. two circles that share the same center
6. opposite over adjacent
7. a quadrilateral with two sets of parallel lines
8. a 90degree angle
12. perpendicular segment from the center of the polygon's circumscribed circle to a side of the polygon
15. sum of two angles that equal 180
18. 3.14159...
20. two angles that make a line
21. a polygon with only inside diagonals
22. opposite over hypotenuse
23. region between two concentric circles
24. arc an arc that is more than 180degrees

1. a line segment whose endpoints line on the circle
2. split an angle or segment in half two make two congruent parts
3. congruent parts of congruent triangles are congruent
4. SSS,AAS,SAS,ASA
5. an equilateral parallelogram
9. A perpendicular segment from a vertex to the base
10. two pairs of consecutive congruent sides
11. on the same plane
13. adjacent over hypotenuse
14. A line segment connecting a vertex of a triangle to the midpoint of the opposite side.
16. a flat surface that extends infinitely along its edges
17. a shape in which all the angles are of the same degree
19. line segment that connects two non-consecutive vertices