Geometry

If EQUILATERAL triangle Z has a perimeter of 30, then each side (AX) = 10

  If FLAX is equilateral, all of the sides are = 10       

                           Area = side * side = 10* 10 = 100 units ²

Equilateral triangle means: A triangle that has equal sides and angles. If the perimeter is 30, the side length of the triangle is 10. The area of FLAX, or the square, is 10 * 10 = 100 square units.