Shape crossword

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Across
  1. 1. this shape has 8 sides
  2. 6. an angle bigger than 90 but less than 180
  3. 7. this shape is like a tilted rectangle.
  4. 9. an isosceles triangle has two ........sides and angles
  5. 10. a 6 sided shape with interior angles that total 720
  6. 11. a 5 sided shape with interior angles that total 540
  7. 13. an angle smaller than 90
Down
  1. 2. this shape has angles that add up to 180
  2. 3. a shape that has equal sides and angles
  3. 4. the angles on a .........line add up to 180
  4. 5. an angle bigger than 180 but less than 360
  5. 8. this shape is like a tilted square
  6. 12. true or false: any quadrilateral has angles that add up to 360