Question

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

9-inch perimeter

A = sq. in.

Answer 1

do you have choices

Answer 2

no :( its a drag and drop but tis something with sqare root
its a triple digit answer sqare root the one more space

Answer 3

An equilateral triangle has all equal sides. Since the perimeter is 9 and there are three equal sides, you know each side of the triangle has to be 3. Similarly, in an equilateral triangle all the angles must be equal, so since their sum is 180 (the sum of the angles in any triangle is 180) each angle is 60. You can now draw the triangle out. Do you think you can get the area now?