Quadrilaterals

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Across
  1. 1. which sides of a parallelogram are equal
  2. 7. lying on or passing through the same straight line
  3. 8. diagonals of a parallelogram _____ each other
  4. 9. all four sides of this parallelogram are equal
  5. 10. the sum of all the angles of this shape is 360 degree
  6. 11. sides opposite to equal angles are _____
  7. 12. this shape is not a parallelogram
Down
  1. 2. a diagonal of this shape divides it into two congruent triangles
  2. 3. a trapezium is a parallelogram, True or False?
  3. 4. this quadrilateral can also be a square
  4. 5. a parallelogram whose all angles are right angles
  5. 6. a quadrilateral in which two pairs of adjacent sides are equal