2. forms a right angle
4. quadrilateral with exactly one pair of parallel sides
8. a three-sided polygon
9. a polygon that is equilateral and equiangular
10. two angles which add to 90 degrees
13. parallelogram with two adjacent sides congruent
16. an angle between 90 and 180 degrees
18. transformation that reduces or enlarges a figure
19. parallelogram with four right angles and two adjacent sides equal
20. a line which intersects a circle in only one point
22. triangle with only two congruent sides
23. from the center of a circle to a point on the circle
24. equal in measure
25. to divide into two equal parts

1. the height of a triangle
2. lines in the same plane which do not intersect
3. the distance around the outside of a figure
5. an ordered arrangement of elements
6. a chord in a circle which contains the center
7. the quotient of one number divided by another number
10. locus of points at a given distance from a given point
11. triangle with three congruent sides
12. angle with 90 degrees
14. segment in a triangle joining any vertex to the midpoint of the opposite side
15. when one figure is an enlargement of another figure
17. triangle with no two sides equal
21. an angle between 0 and 90 degrees