Hello!
To find the area of a trapezoid, you use the formula below, where a and b represent the two bases, and h is the height.
0.5(a+b)(h)
Let's plug in our numbers.
0.5(7.5+2.5)(2.5)
0.5(10)(2.5)
5(2.5)
12.5
Therefore, our area is 12.5 square units.
I hope this helps!