Answer:
45mm
Step-by-step explanation:
First, find the whole area of the square, which is 225 mm squared.
Then, we have to find the area of the shaded trapezoid. Remember, the area of the trapezoid is [tex]\frac{h(b^{1}+b^{2} }{2}[/tex]
We get the area of the trapezoid to be 180 mm.
We subtract 180 from 225 mm to get 45 mm as our answer.
