Answer:
height = 3
base = 4
area of a triangle = [tex]\frac{1}{2} *base*height[/tex]
so [tex]\frac{1}{2}*4*3 = \frac{1}{2} *12 = 6[/tex]
6*4(four triangles)= 6+6+6+6 = 24
area of the square = 4*4 = 16
(squares have equal sides)
total surface area= 16+24 = 40 units²
