### Home > CCG > Chapter 8 > Lesson 8.1.4 > Problem8-40

8-40.

Esteban used a hinged mirror to create an equilateral triangle, as shown in the diagram at right. 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.