Four equilateral triangles are constructed on the sides of a square with side length 1 as shown below. The four outer vertices are then joined to form a large square. Find the area of the large square.
https://web2.0calc.com/questions/help-pls_81
1 * cos 15 = x x= .965925
side length = 2x
area = 2x * 2x = 3.732 units2
A = 1/2(1 + √3)2
