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

Answer 1

Answer: (C)

Two pentagonal shapes joined together to form an enclosed 3-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.

If we join any $2$-dimensional shapes, it does not imply that the shape created is a prism.

Circular shapes does not have flat faces in $3$-dimensional plane.

If we join two pentagonal shapes, we get a prism.

Hence, option C is correct.