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Across 5. A quadrilateral with four right angles 11. For any real number (a, a=a) 12. The opposite angles formed by two intersectingg lines 13. For all real numbers (a,b, and c, if a=b and b=c then a=c) 17. A polygon in which all angles are congruent 18. The pharse following the word if in a conditional statement 21. Two angles in a plane that share a common vertex and a common side but have no interior points in common 24. An angle whose measure is greater than 90 degrees 28. A quadrilateral with two pairs of parallel sides 29. The relationship between figures having the same shape and same size 30. A figure formed by two rays with a common endpoint 31. A segment from a vertex to the midpoint of the opposite side in a triangle

Down 1. A triangle with three acute angles 2. A shape that results from a transformation of a figure known as the preimage 3. A triangle in which all three sides are congruent 4. A quadrilateral with one and only one pair of parallel sides 6. A polygon in which all sides are congruent 7. The point where the three medians of a triangle intersect 8. A point at an end of a segment or a starting point of a ray 9. Lying in the same plane 10. A quadrilateral with four congruent sides and four right angles 14. A statement that is believed to be true 15. A statement using "if and only if" 16. A ray that divides an angle into two congruent angles 19. An angle whose measure is less than 90 degrees 20. Lying on the same line 22. A line, ray, or segment that intersects two or more coplaner lines, rays, or segments, each at a different point 23. A statement that is accepted as true without proof 25. A point where the edges of a figure intersect 26. A statement that has been proven to be true deductively 27. Abbreviation for "corresponding parts of congruent triangles are congruent"