mathematics

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Across
  1. 2. opp. side of pair are parallel, opp. pair of angle are equal and all sides are equal
  2. 4. A three-dimensional shape with a polygonal base and triangular faces converging at a point
  3. 5. A three-dimensional shape with six square faces
  4. 7. A polygon with six sides
  5. 9. other name of cuboid
  6. 11. 3 sided figure with 2 equal sides
  7. 12. Lines that are always the same distance apart and never intersect
Down
  1. 1. Sum of two right angle
  2. 3. A closed curve where all points are equidistant from the centre
  3. 6. A quadrilateral shape with two pairs of adjacent sides that are equal in length
  4. 8. has four centres and the tangents at the connecting points
  5. 10. A shape with four sides, no parallel sides, and different angles