Congruency words

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Across
  1. 3. A triangle with all sides of unequal length.
  2. 4. A triangle with two sides of equal length.
  3. 5. The longest side of a triangle.
  4. 8. A triangle with a 90 degree angle.
  5. 9. A straight line inside a shape that goes from one corner to another.
  6. 13. A triangle with all 3 sides of the same length.
  7. 14. A quadrilateral with one pair of parallel sides.
  8. 15. A parallelogram where all sides are congruent.
  9. 17. The amount of turn between two straight lines that have a common end point.
  10. 18. A shape with 4 sides.
  11. 19. Lines that intersect and divide a shape into equal sizes.
Down
  1. 1. A straight line cutting a parallel line.
  2. 2. A line.
  3. 6. A quadrilateral where the opposite sides are parallel.
  4. 7. A symbol that represents an number that's unknown.
  5. 10. A parallelogram in which all angles are 90 degrees.
  6. 11. The objects are _______ if they have the same dimensions and shape.
  7. 12. A shape with 3 sides.
  8. 16. - A quadrilateral in which adjacent pairs of sides are congruent.
  9. 20. A rectangle where all sides are congruent.