Question

# Fill in the blanks: (i) An object that occupies space is called a ...... . (ii) A cuboid has ...... faces, ...... edges and ...... vertices. (iii) The ...... faces of a cuboid are identical. (iv) A ...... has no vertex and no edge. (v) All the faces of a ...... are identical. (vi) A square pyramid has ...... lateral triangular faces and ...... edges. (vii) A triangular pyramid has ...... triangular lateral faces and ...... edges. (viii) A triangular prism has ...... vertices, ...... rectangular lateral faces, ...... triangular bases and ...... edges.

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Solution

## (i) An object that occupies space is called a solid. (ii) A cuboid has 6 rectangular faces, 12 edges and 8 vertices. (iii) The opposite faces of a cuboid are identical. (iv) A sphere has no vertex and no edge. (v) All the faces of a cube are identical. (vi) A square pyramid has 4 lateral triangular faces and 8 edges. (vii) A triangular pyramid has 3 triangular lateral faces and 6 edges. (viii) A triangular prism has 6 vertices, 3 rectangular lateral faces, 2 triangular bases and 9 edges.

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