Mensuration

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Across
  1. 1. polyhedron whose base is a polygon and whose lateral faces are triangles with a common vertex
  2. 3. the calculation of geometric quantities such as length, area and volume using dimensions
  3. 5. a quadrilateral with one pair of opposite sides parallel
  4. 7. perimeter of a circle
  5. 8. a line segment at which two faces of a solid meet
Down
  1. 1. a simple closed curve made up of only line segments
  2. 2. a polygon with four sides
  3. 4. polyhedron whose base and top are congruent polygons and whose other faces are parallelogram
  4. 6. a point at which edges meet
  5. 7. a 3-D shape whose height, breadth and length all are equal