Question

What is the surface area?

Answer 1

check the picture below.

so as you can see, the figure is really just 3 rectangles and 2 triangles.

the rectangles are 5x7, another 5x7, and the one at the bottom is a 6x7.

the triangles have a base of 6, a height of 4.

so, just the area of each, add them up, and that's the area of the figure.


`\bf \stackrel{left~and~right}{(5\cdot 7)}+\stackrel{bottom}{(6\cdot 7)}+\stackrel{front~and~back}{2\left[(1)/(2)(4)(6) \right]}`