Answer
The sides are about 6.93 inches long.
Work Step by Step
The altitude of an equilateral triangle splits the shape into two 30 60 90 triangles. Use the relationships between the sides of a 30 60 90 triangle to form the following equation:
s=2($\frac{6}{\sqrt 3}$)
s=$\frac{12\sqrt 3}{3}$
s=4$\sqrt 3$
s$\approx$6.93
