Question

find the area of an equilateral triangle of side 3 cm ​

Answer 1

Answer:

9 root 3 / 4

Step-by-step explanation:

area of equilateral triangle =

$\sqrt{3} \div 4 \times a {}^{2} \\ \sqrt{3} \div 4 \times 3 \times 3$

$9 \sqrt{3} \div 4$

Answer 2

Answer:

Hence, value of area of equilateral triangle having side 3 cm will be $\frac{9{\sqrt{3}}}{4}\:cm^2$

Step-by-step explanation:

In context to question asked,

We have to determine the value of area of equilateral triangle.

As per data given in the question,

We have,

Side of equilateral triangle = 3 cm

As we know that,

Equilateral triangle is that particular triangle whose all sides are equal.

As we have,

Formula for finding the area of equilateral triangle -

$Area = \frac{{\sqrt{3}}}{4}\:side^2$

So, for determining the value of area of equilateral triangle, we will put the value of side of triangle in above formula,

So, we will get it as,

$Area = \frac{{\sqrt{3}}}{4}\:side^2\\Area = \frac{{\sqrt{3}}}{4} \times 3 \times 3\\=>Area =\frac{9{\sqrt{3}}}{4}\:cm^2$