 QUESTION

# What is a Prism?(a). Two 2 – dimensional shapes joined together to form any enclosed multi – dimensional shape.(b). Two 2 – dimensional shapes joined together to form an enclosed 3 – dimensional shape.(c). Two pentagonal shapes joined together to form an enclosed 3 – dimensional shape.(d). Two circular shapes joined together to form an enclosed 3 – dimensional shape.

- Hint:- Let us first know about 2 – Dimensional shapes and 3 – Dimensional shapes.
TWO – DIMENSIONAL SHAPES: A two-dimensional shape (2 – D shape) has only two measurements, that are length and breadth.
For example: A square, triangle, circle, rectangle, etc are all examples of 2 – D shapes.
THREE – DIMENSIONAL SHAPES: A three – dimensional shape (3 – D shape) has only three measurements, that are length, width, as well as height.
For example: A cube, cone, sphere, cuboid, etc. are all examples of 3 – D shapes.

Complete step-by-step solution -

Let us now learn about prism.
PRISM: A prism is a polyhedron, which has two parallel faces that are called the bases. The faces other than the bases are always parallelograms. A prism is named by the shape of its base.
It is a 3 – dimensional shape having flat faces, identical ends and same cross section.
Let us now consider all the option:-
(a). Two 2 – dimensional shapes joined together to form any enclosed multi – dimensional shape.
A prism is a polyhedron, with two parallel faces called bases. The other faces are always parallelograms. It is a 3-dimensional shape having flat faces, identical ends and same cross section.
So, option (a) is incorrect.
(b). Two 2 – dimensional shapes joined together to form an enclosed 3 – dimensional shape.
If we join any 2-dimensional shapes, it does not imply that the shape created is a prism.
Therefore, option (b) is also incorrect.
(c). Two pentagonal shapes joined together to form an enclosed 3 – dimensional shape.
When we join two pentagonal shapes, we get a prism.
Hence, option (c) is the correct one.
(d). Two circular shapes joined together to form an enclosed 3 – dimensional shape.
Circular shapes do not have flat faces in 3-dimensional planes.
So, option (d) is incorrect.
Therefore, the correct option for this question is (c) Two pentagonal shapes joined together to form an enclosed 3 – dimensional shape.

Note:- Let us now know about the Triangular Prism.
TRIANGULAR PRISM: A triangular prism is a prism that is composed of two triangular bases and three rectangular sides.