Find the surface area. round your answers to the nearest hundredths if necessary.

Area of triangle = (base x height)/2
There are all together 4 triangles and 1 square. 
Therefore, surface area = area of square + 4 x area of triangle 

height = 5.8 in, base = 6 in. area of square = 6x6 = 36 in^2.

area of 1 triangle = (5.8x6)/2 
area of 4 triangles = 2x5.8x6 = 69.6 in^2

surface area = 69.6 + 36 = 105.6 in^2