Across
- 2. segment joining two nonconsecutive vertices of a convex polygon
- 3. segment whose endpoints are the vertex and the midpoint of the opposite side
- 4. distance around a geometric figure
- 5. equilateral parallelogram
- 7. parallelogram with one pair of parallel sides
- 9. points lying on the same plane
- 10. quadrilateral with both pairs of opposite lines parallel
- 13. no sides of the triangle are equal
- 16. segments enclosing the shape
- 17. line that intersects two or more coplanar lines at different points
- 18. angle larger than 180 degrees
Down
- 1. line that splits a triangle into two equal triangles
- 4. statement assumed to be true without proof
- 5. parallelogram with four right angles
- 6. parallelogram with four congruent sides and four congruent right angles
- 8. the number of square units enclosed in a geometric figure
- 11. perpendicular segment from the vertex of the triangle to the line containing the opposite side
- 12. equilateral and equiangular
- 14. all sides of a triangle are equal
- 15. when three or more lines intersect at one point