### Home > CCG > Chapter Ch8 > Lesson 8.1.4 > Problem 8-40

8-40.

Esteban used a hinged mirror to create an equilateral triangle, as shown in the diagram below. If the area of the shaded region is 11.42 square inches, what is the area of the entire equilateral triangle? Justify your solution.

Each of the triangles is a reflection of another triangle, so all of the triangles are congruent.