Quadrilaterals Page 2

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Across
  1. 1. The diagonals of a square ___each angle into exactly two 45 degree angles.
  2. 4. All sides are congruent, but no right angles.
  3. 6. If both pairs of ___ sides of a quadrilateral are parallel, then it is always a parallelogram.
  4. 8. All ____ angles in a parallelogram are supplementary.
  5. 10. The _____of a trapezoid is one-half the sum of the bases.
  6. 12. Every side of a rhombus is ___ to every other side.
  7. 13. The diagonals are not congruent; they bisect each other but do not form right angles.
  8. 14. The diagonals are congruent and bisect each other but do not form right angles.
  9. 15. The ____angles of a polygon are (n-2)180.
  10. 16. A trapezoid is isosceles if and only if the ____are congruent.
Down
  1. 2. The diagonals are congruent, and form perpendicular bisectors.
  2. 3. If only one set of consecutive angles are ___then this quadrilateral is not a parallelogram.
  3. 5. The ___ angles of a polygon always add up to 360 degrees.
  4. 7. The parallel sides are called ____in a trapezoid.
  5. 9. The diagonals of a square form four congruent right ___ triangles.
  6. 11. Two sides parallel. Two sides not parallel.