Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 2D

Question:

The perimeter of an equilateral triangle is 36 cm. What is the area of this triangle?

Options:

$96 \sqrt{3}$ cm2

$36 \sqrt{3}$ cm2

$24 \sqrt{3}$ cm2

$27 \sqrt{3}$ cm2

Correct Answer:

$36 \sqrt{3}$ cm2

Explanation:

Given that,

The perimeter of a equilateral triangle = 36

and we know the perimeter = 3(side)

= 3(side) = 36

= side = 12

So the area of a equilateral triangle = \(\frac{\sqrt {3}}{4}\) × (side)2  

= \(\frac{\sqrt {3}}{4}\) × (12)2   = $36 \sqrt{3}$ cm2