Question

A equilateral triangle perimeter 12m.What is its area.?

Answer 1

Answer:

perimeter is 12 metre

side of triangle is 3

then 12÷3 = 4

area is side×side

i.e. 4×4 is 16 metre

Answer 2

Answer:

Area of the equilateral triangle = 4$\sqrt{3}$ $m^{2}$

Step-by-step explanation:

Perimeter = 12m

We know that each side of an equilateral triangle is equal ..

Let each side measure x .

Therefore,

x + x + x = 12m

3x = 12

x = 12/3

x = 4m.

Area of an equilateral triangle = $\frac{\sqrt{3} }{4} a^{2}$

                                                   = $\frac{\sqrt{3} }{4}$ x 4 x 4

                                                   = $\frac{\sqrt{3} }{4}$ x 16

                                                   = 4$\sqrt{3}$ $m^{2}$