Geometric Defined Term and theorem

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Across
  1. 3. The sum of ___ angles on the same side of the transversal is 180°
  2. 5. sum of interior angles of this polygon is 180°
  3. 6. The sum of interior angles of this polygon is 360°
  4. 9. Quadrilaterals has opposite sides parallel and equal in length.
  5. 11. Quadrilaterals that at least one pair of opposite sides are parallel to each other.
Down
  1. 1. two pair of adjacent side are equal in length.
  2. 2. each interior angle is 60°
  3. 3. triangle having two equal sides.
  4. 4. Quadrilaterals that two diagonals are of equal length.
  5. 7. Two diagonals "bisect" each other at right angles.
  6. 8. has equal sides (marked "s") and every angle is a right angle (90°)
  7. 10. one angle is equals 90°