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Across 3. if three pairs of corresponding sides are congruent, then the triangles are congruent 5. of a line segment divides the segment into two congruent parts 6. is a quadrilateral with exactly one pair of parallel sides 7. if the lines are concurrent, then they intersect at the same point 9. are polygons with four sides and four angles 10. is the shortest distance between a vertex of a triangle and the opposite side 12. is a quadrilateral with two distinct pairs of congruent, adjacent sides 13. Is a polygon that has all congruent sides and all congruent angles. 16. is a line or ray or line that divides an angle in half 18. if two pairs of corresponding angles and either pair of corresponding sides that are not included are congruent, then the triangles are congruent 22. is a line segment drawn from a vertex of a triangle to the midpoint of the opposite side 23. an angle or line segment means dividing it into two congruent parts 24. if two pairs of corresponding sides and the corresponding included angles are congruent, then the triangles are congruent 25. is the point at which the medians of a triangle

Down 1. is a line that is perpendicular to a line segment and passes through the mid point of the line segment 2. two right triangles and one pair of corresponding legs are congruent, then the right triangles are congruent 4. is the point at which the angle bisectors of a triangle intersect 8. if two pairs of corresponding angles and the included pair of corresponding sides are congruent, then the triangles are congruent 11. have angles measures that add to 180 degrees 14. is a quadrilateral in which opposite sides are parallel and congruent 15. are congruent will allow you to prove that the triangles are congruent 17. of a polygon is an angle formed by two sides of the polygon 19. of a polygon is an angle created by extending one side of the polygon outside the figure 20. is the point at which the three perpendicular bisectors of the sides of a triangle intersect 21. is the point at which the three altitudes of a triangle intersect