Geometry

4. quadrilateral that has four congruent sides
7. triangle a triangle with three equal sides
9. corresponding angles are congruent; corresponding sides are proportional
11. polygon with exactly four sides
13. angles of a polygon that share a side
14. the "if" and "then" parts of a statement are switched
16. point at which two line segments intersect forming an angle
17. bisector Ray that cuts the angle exactly in half, making two equal angles
18. a statement that two ratios are equal
19. angle an angle that measures 90°

1. all corresponding lengths are the same
2. triangle a triangle measured more than 90°
3. mean the positive number x such that a / x = x/ b
5. distance around a circle
6. statement - the ratio of the lengths of corresponding sides
8. a quadrilateral that has two pairs of opposite sides that are parallel
10. the side opposite of the right angle in a triangle
12. a segment connecting any vertex of a triangle to the midpoint of the opposite side
13. 3 or more lines meet at a single point
15. a comparison of two quantities