Answer && Step-by-step explanation:
We know that area for rectangle/square is Width * Height
Triangles 1/2 * Base*Height
we can see the height of the triangle will be 6 feet, as 10 feet is the "height" (length) of the rectangle
solve by multiplying the rectangle's sides (I cant see if that is a 9 or not but:)
9*10 = 90
keep it in mind, now we know 9==base for triangle, thus;
(9*6)*1/2==27
90+27
117 sq ft.
A.