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Across 4. two rays that have a common endpoint and form a line 8. a pair of adjacent angles who's noncommon sides are opposite rays 11. names a location 12. two angles who's measure with a sum of 180 14. two angles in a same plane with a common vertex and a common side 16. a figure formed by two rays with a common endpoint called the vertex 18. straight path with no thickness and extends forever 19. sum of the side lengths of the figure 20. a point that divides or bisects the segment into two congruent segments

Down 1. statement accepted as true without proof 2. two angles who's measures have a sum of 90 3. segments that have the same length 5. flat surface with no thickness and extends forever 6. starts at an end point and goes through another point 7. a point at the end ofa segment 9. part of a line between two points 10. the distance from zero 13. the set of all points inside the angle 15. three or more pionts on the same plane 17. the set of all points outside the angle