What is area of equilateral triangle?
If the sides of an equilateral triangle are all of length
Consider an equilateral triangle with sides of length
If you bisect it to make two right angled triangles, then those triangles will have hypotenuse of length
The two right angled triangles can be rearranged (turning one over) into a rectangle with sides
The area of the rectangle, which is the same as the area of the original triangle is: