Geometry

3. a ninety degree angle
6. infinite straight lines that never intersect
9. angles that sum together to equal ninety degrees
14. set consisting of the distinct points a and b all points a and b and all points for which b is between a
15. middle of line segment
16. an ordered pair of real numbers
17. a transformation or composition that preserves size and shape
18. set consisting of the distinct a and b (Its endpoints) all point between a and b
20. the sum of the measures of the angles of any triangle is 180

1. a quadrilateral with two sets of parallel lines
2. two congruent sides of an isosceles triangle
4. the set of ordered pairs of real numbers
5. the side that's different in length from the other 2 equal
7. the side connecting 2 specified angles
8. the side of the right triangle that is opposite the right angle
10. adjacent lines next to each other
11. a quadrilateral with one set of parallel lines and congruent base angles
12. the information that is provided
13. a flat 2 dimension surface that extends infinitely in every direction
19. a quadrilateral with 2 pairs of congruent sides