How many faces are there in a cube (i) cube (ii) pentagonal prism (iii) tetrahedron (iv) pentagonal pyramid?

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Solution

Faces of (i) cube are 6 (ii) pentagonal prism are 7 ( 5 + 2) (iii) tetrahedron are 4 (iv) pentagonal pyramid are 6

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How many vertices are there in a (i) cuboid (ii) tetrahedron (iii) pentagonal prism (iv) square pyramid ?

State, the number of faces, number of vertices and number of edges of :
(i) a pentagonal pyramid
(ii) a hexagonal prism

7

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