Math crossword

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Across
  1. 2. A plain figure with 3 straight sides and 3 angles
  2. 4. A quadrilateral with only one pair of parallel sides
  3. 6. the square has a side measuring 4cm what is the perimeter
  4. 7. the distance on an object from side to side
  5. 8. plural word for highest point
  6. 10. the surface area of a cube with a side of 2cm?
  7. 13. measured in square units
  8. 14. vertical distance from the top of an object to the base
  9. 16. A polyhedron with 3 or more triangular faces that meet in an apex
  10. 17. prism with 6 rectangular sides
  11. 19. A parallelogram with opposite equal acute angles, opposite equal acute angles and 4 equal sides
Down
  1. 1. the distance around the outside of a shape
  2. 2. the rectangle has a length of 5cm Height of 3cm and width of 2cm what is volume
  3. 3. solid figure with more than six sides?
  4. 5. the amount of space an object occupies
  5. 9. area units are always_?
  6. 11. prism with 3 rectangular sides and 2 triangular sides
  7. 12. the measure of the total area that the surface of an object occupies
  8. 15. polyhedron with 2 parallel faces and 2 parallelograms
  9. 18. 3D object with 6 equal squares