Question

Find the area of an equilateral triangle (regular 3-gon) with the given measurement.

6-inch side.

A = sq. in.

Answer 1

30 60 90 triangle.

So x = 3

Thus:: 6 * 3 sqrt 3 /2

Answer 2

\[A = \frac14s^{2}√3\]

Answer 3

I find that memorizing this formula is really helpful. :)

Answer 4

9 sqrt 3 final answer.