Geometry Crossword

4. a pair of adjacent supplementary angles
6. a statement that can be proved to be true based on known and proven facts
11. identical in shape and size
12. a line segment joining a vertex to the midpoint of the opposite side
13. 4-sided polygon with 4 edges and 4 corners
15. the perimeter of a circle
16. the measure of a region's size on a surface
18. if two angles are not congruent, then they do not have the same measure.
19. a line ray or line segment that intersects
20. a set of collinear points with no curves and extends limitlessly

1. an 8-sided polygon
2. a two-dimensional closed shape with 4 equal sides
3. a triangle in which all three sides are in different lengths, and all three angles are of different measures
5. a location represented by a dot
7. an angle that equals 90 degrees
8. a triangle that has all its sides equal in length
9. a figure which is formed by two rays or lines that share a common endpoint
10. a mathematical statement that appears to be true, but has not been formally proven
14. two lines that meet or intersect with each other
17. a point near the middle of the center