The name of the solid in Fig. 12.18 is:
(a) triangular pyramid
(b) rectangular prism
(c) triangular prism
(d) rectangular pyramid
Solution:
We know that
A triangular prism is a 3D polyhedron with three rectangular faces and two triangular faces.
The rectangular faces are referred to as the lateral faces, while the triangular faces are called bases.
The bases are also called the top and the bottom (faces) of the prism.
The 2 triangular faces are congruent to each other, and the 3 lateral faces which are in the shape of rectangles are also congruent to each other.
A triangular prism has 5 faces, 9 edges, and 6 vertices.
Therefore, the solid is a triangular prism.
✦ Try This: Show the rotational symmetry of a pentagon.
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 14
NCERT Exemplar Class 7 Maths Chapter 12 Problem 8
The name of the solid in Fig. 12.18 is: (a) triangular pyramid, (b) rectangular prism, (c) triangular prism, (d) rectangular pyramid
Summary:
The name of the solid in Fig. 12.18 is a triangular prism.
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