Across
- 8. a pair of nonadjacent angles formed by two intersecting lines
- 10. an angle greater than 90 degrees but less than 180 degrees
- 12. two angles whose sum of their measures is 90 degrees
- 13. an angle of measure 180 degrees
- 15. a quadrilateral with exactly one pair of parallel sides
- 17. a curve that never touches a point more than once
- 19. an angle measuring 90 degrees
- 20. a rectangle with all sides of equal length
Down
- 1. two angles whose sum of their measures is 180 degrees
- 2. a simple closed polygonal curve
- 3. a figure that contains the segment for each pair of point P and Q contained in the figure
- 4. a triangle having three acute angles
- 5. two nonintersecting lines belonging to a common plane
- 6. a convex polygon that is both equilateral and equiangular
- 7. angles measuring between 0 and 90 degrees
- 9. two angles that have a common side and nonoverlapping interiors
- 11. a curve that ends at the same point it began
- 14. two nonintersecting lines which do not belong to a common plane
- 16. a parallelogram with all of its sides the same length
- 18. the union of two rays with a common endpoint