mathsssss

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Across
  1. 2. exactly 90 degrees
  2. 4. dealing with the relations of the sides and angles of triangles
  3. 6. the side opposite to the right angle
  4. 11. half a diameter
  5. 13. two equal sided triangle
  6. 15. a quadrilateral with one pair of sides parallel
  7. 16. missing angle
  8. 18. perimeter of a circle
  9. 19. y=mx+c
  10. 20. the amount of space that a substance occupies
Down
  1. 1. sum of all sides
  2. 3. more than 90 degees
  3. 4. opposite/adjacent
  4. 5. geometry dealing with 2d and 3d shapes
  5. 7. 3.142
  6. 8. opposite/hypotenuse
  7. 9. adjacent/hypotenuse
  8. 10. less than 90 degrees
  9. 12. double a radius
  10. 14. measurement of a surface
  11. 17. triangle with all sides different length