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Home > GC > Chapter 8 > Lesson 8.1.4 > Problem 8-37


A triangle where from each vertex, a dotted line is drawn to the midpoint of the opposite side. The bottom left right triangle is shaded.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 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.