Question

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

3-inch radius

Answer 1

a radius is defined as the measure of the center to a vertex

Answer 2

what's the formula for area again?

Answer 3

in this case, we may need to use trig functions; or special triangle relations

but area of a triangle amounts to half the area of its rectangle:\[A=\frac12bh\]

Answer 4

I'll be back later

Answer 5

using special triangle relations we can form some relevanat information like this