revision with 2d shapes 2

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Across
  1. 4. all 2d shapes are f____.
  2. 8. a triangle with 2 equal sides and 2 equal angles
  3. 9. its angles add up to 180 degrees
  4. 10. a shape whose sum of angles adds up to 360 degrees
  5. 14. meeting at 90 degrees.
  6. 15. a decagon has ______ sides.
  7. 16. a triangle in which all sides and angles are different
  8. 18. a 2d shapes with 8 sides.
Down
  1. 1. a parallelogram with 4 equal sides. It looks like a diamond.
  2. 2. a triangle whose sides are all equal.
  3. 3. the number of sides in a heptagon
  4. 5. a polygon with all angles and sides equal.
  5. 6. lines that never meet.
  6. 7. a 2d shape with 6 sides
  7. 11. a quadrilateral with one pair of parallel sides.
  8. 12. a 2d shape with 5 sides
  9. 13. the angles at the centre of a circle add up to three-hundred and ______________ degrees.
  10. 17. the number of sides in a nonagon