Question

Match the following diagrams with their perimeters.

• A. $4a$
• B. $6a$
• C. $2\sqrt{3}a+a$

Answer 1

Concept: Perimeter is the total length of the boundary of the closed figure.
Let's look at the images one by one:
A.

Here, perimeter = Sum of length of the sides
$=a+a+a+a=4a$ units

B.
Here, Perimeter $=2a+a+2a+a=6a$ units

C.
Perimeter $=\sqrt{3}a+\sqrt{3}a+a=2\sqrt{3}a+a$ units