You can put this solution on YOUR website! When you draw the altitude, you divide the equilateral triangle into two right
triangles. In one of the right triangles, one of the legs is , the other
leg is the altitude, and the hypotenuse is .
So you use the :
let altitude be
one leg squared plus the other leg squared = the hypotenuse squared.
Which you simplify to times the
The area is half the product of base and height.