the total area needed to be wrap is 120 square inches
It is calculated by adding the area of all the faces of the triangular prism
since the triangle is a right triangle. it has the parts of base = 3, height = 4 and hypotenuse = 5
the area of the triangle
A = 1/2 * b *h = 1/2 * 3 * 4 = 6
There are 2 triangles and 3 rectangles
the area of the rectangles are
A = b*h = 9*3 = 27
A = 9*4 = 36
A = 9*5 = 45
The total area is
6 + 6 + 27 + 36 + 45 = 120
