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How many faces does each of the following solids have?
(a) Tetrahedron
(b) Hexahedron
(c) Octagonal Pyramid
(d) Octahedron

Solution:

We have to find the number of faces in each of the given solids.

(a) Tetrahedron

A tetrahedron is a polyhedron with 4 faces, 6 edges, and 4 vertices, in which all the faces are triangles.

(b) Hexahedron

A hexahedron is a polyhedron with six faces.

(c) Octagonal Pyramid

An octagonal pyramid has 9 vertices, 9 faces, and 16 edges.

(d) Octahedron

An octahedron is a polyhedron with 8 faces, 12 edges, and 6 vertices and at each vertex 4 edges meet.

Therefore, the required number of faces of each of the given solids are 4, 6, 9 and 8.

✦ Try This: How many faces does heptahedron have?

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 10

NCERT Exemplar Class 8 Maths Chapter 6 Problem 63

How many faces does each of the following solids have? (a) Tetrahedron (b) Hexahedron (c) Octagonal Pyramid (d) Octahedron

Summary:

The number of faces of each solids is given below (a) Tetrahedron - 4 faces, (b) Hexahedron - 6 faces, (c) Octagonal Pyramid - 9 faces, (d) Octahedron - 8 faces

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