Answer:
2880
Step-by-step explanation:
The base is made up of two triangles and a square, if that makes sense. Finding the area of a triangle is (base x height)/2.
The base of the tiny triangle is 4 because there is 8 inches extra to the 10 inch square. 10 x 4 = 40.
Now we have a 10 by 10 square: 10 x 10 = 100.
So, the area of the trapezoid is 140. There are two trapezoids in this prism, so both bases are 280.
The surface area of the sides are solved by 12 x 50 = 600. Together, the sides equal 1200.
The top is solved by 10 x 50 = 500.
The bottom is solved by 18 x 50 = 900.
Add them all together: 280 + 1200 + 500 + 900 = 2,880
