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Across 1. The opposite angles formed by two intersectingg lines 5. The mean or average of a set of data measured on a logarithmic scale 6. A segment from a vertex to the midpoint of the opposite side in a triangle 9. A point where the edges of a figure intersect 13. collection of points along a straight path 14. has one endpoint and extends in the other direction 15. a triangle with one right angle 16. A triangle with three acute angles 18. A plane figure with at least three straight sides and angles and typically five or more. 19. A shape that results from a transformation of a figure known as the preimage 20. A quadrilateral with four congruent sides and four right angles 21. a quadrilateral with 2 pairs of parallel sides

Down 2. a quadrilateral with only 1 set of parallel sides 3. A figure formed by two rays with a common endpoint 4. a triangle that has no equal sides 7. Lying on the same line 8. An angle whose measure is greater than 90 degrees 10. lines that never intersect 11. part of a line that has two end points 12. Two angles in a plane that share a common vertex and a common side but have no interior points in common 14. A quadrilateral with four right angles 17. an exact location in space or dot