# Which of the following will not form a polyhedron?

(a) 3 triangles

(b) 2 triangles and 3 parallelogram

(c) 8 triangles

(d) 1 pentagon and 5 triangles

**Solution:**

We have to find the given combination of figures which will not form a __polyhedron__.

A solid is a polyhedron if it is made up of only polygonal faces, the faces meet at edges which are line segments and the edges meet at a point called vertex.

A polyhedron has more than four polygonal faces.

2 triangles and 3 __parallelograms__; 8 triangles and 1 pentagon and 5 triangles has more than four polygonal faces.

In the case of 3 triangles, there are only three faces.

Therefore, 3 triangles will not form a polyhedron.

**✦ Try This: **Which of the following will not form a polyhedron?

(a) 2 triangles and 1 parallelogram

(b) 2 triangles and 3 parallelogram

(c) 8 triangles

(d) 1 pentagon and 5 triangles

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

**NCERT Exemplar Class 8 Maths Chapter 6 Problem 2**

## Which of the following will not form a polyhedron? (a) 3 triangles, (b) 2 triangles and 3 parallelogram, (c) 8 triangles, (d) 1 pentagon and 5 triangles

**Summary:**

3 triangles will not form a polyhedron

**☛ Related Questions:**

- Which of the following is a regular polyhedron? (a) Cuboid, (b) Triangular prism, (c) Cube, (d) Squa . . . .
- Which of the following is a two Dimensional figure? (a) Rectangle, (b) Rectangular Prism, (c) Square . . . .
- Which of the following can be the base of a pyramid? (a) Line segment, (b) Circle, (c) Octagon, (d) . . . .

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