Across
- 3. _________ which guarantee that a quadrilateral a parallelogram.
- 5. The Midsegment Theorem.
- 8. A diagonal of a parallelogram forms ____ congruent triangles.
- 12. Two angles sharing a common side and vertex but no interior.
- 15. Theorem 2. The diagonals of a rectangle are ______.
- 17. A ______ of a parallelogram divides the parallelogram into two congruent
- 18. The base ______ of an isosceles trapezoid are congruent.
- 19. A quadrilateral with 4 right angles and 4 equal sides
- 20. In a parallelogram, any two consecutive angles are _______.
- 22. The diagonals of an isosceles trapezoid are congruent.
- 23. A _______ is a parallelogram.
- 25. The _________ Theorem. The segment that joins the midpoints of two sides of a triangle is parallel to the third side and half as long.
- 27. Each diagonal of a rhombus bisects opposite angles.
- 28. The base angles of an isosceles trapezoid are congruent.
- 30. A quadrilateral with exactly one pair of opposite sides parallel.
- 31. It is defined as a quadrilateral with two pairs of adjacent and congruent sides.
- 32. Two angles whose sum of the measures is 90°
- 36. In quadrilateral ABCD, ∠A and ∠B are ______ angles.
- 37. If all three sides of one triangle are equal to the corresponding sides of another triangle, the two triangles are congruent.
- 38. The segment joining the midpoints of the legs of a trapezoid is called?
- 40. A quadrilateral is a parallelogran if each diagonal ________ a parallelogram into two congruent triangles.
- 41. A statement that needs to be proven before being accepted.
Down
- 1. Two nonadjacent angles formed by two intersecting lines.
- 2. If a parallelogram has one right angle, then it has four right angles and the parallelogram is a rectangle.
- 4. __________ Proof. - A way to show step-by-step reasoning to prove something is true.
- 6. A closed plane figure consisting of four-line segments or sides.
- 7. The segment that joins the _______ of two sides of a triangle is parallel to the third side and half as long.
- 8. A quadrilateral is a parallelogran if each diagonal divides a parallelogram into two congruent _________.
- 9. These are the steps or facts you use to solve a problem or prove something is true.
- 10. These explain why each statement is true.
- 11. The angles formed by a base and a ___ are called base angles.
- 13. A quadrilateral with two pairs of opposite sides that are parallel.
- 14. Opposite angles of an isosceles trapezoid are supplementary.
- 16. A quadrilateral is a parallelogram if ___ pair of opposite sides are congruent and parallel.
- 21. In a kite, the diagonals are ___________ to each other.
- 24. ___ Congruence Postulate states if three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent.
- 26. A quadrilateral is a parallelogram if the diagonals _____ each other.
- 29. The parallel sides of a trapezoid are called?
- 30. The diagonals of a rhombus are perpendicular.
- 33. ______ angles of an isosceles trapezoid are supplementary.
- 34. A quadrilateral is a parallelogram if pairs of _______ angles are supplementary.
- 35. In a parallelogram, any two opposite ____ are congruent.
- 39. The diagonals of a rectangle are congruent.