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

9-inch perimeter

a = sq. in.

3.89 inches square

Step-by-step explanation:

We are given with an equilateral triangle and we are required to find its area.

The area of an equilateral triangle is given by the formula

Where s is the side of triangle.

Also given that perimeter is 9 inches. This means sum of all equal sides is 9

or

3s=9

that is

x

s=3

Now we put the value of s from here in our formula for Area

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.