Answer:
1,863
Step-by-step explanation:
ok I will try to explain my answer as easy and under standable as posable.
ok what I did is the left and right side of the building I drew two lines down the middle to crate two huge rectangles on each side and one small rectangle in the middle ok. hope you understand! if you don't click the file down below.
ok after you see the file you will under stand a lot better.
ok
what I did is on the left and right triangle I did 31 tall and 23 wide. what you do I multiply the two numbers.
31 x 23 = 713
then the middle triangle is 23 wide and I did 31 - 12 to get the tall of the triangle since it did not give it to you so I got 19.
so I multiplied 23 by 19 and got 437.
so you adding all three triangles and I get 1,863 by
713 + 713 + 437 = 1,863
hope this helps