Answer:
195 square inches
Step-by-step explanation:
The formula for the area of a trapezoid is given by the formula
A = 1/2(b₁+b₂)h
We have b₁ and h. We must find b₂.
Since this trapezoid is isosceles, the base of the triangle on the right will be the same as the base of the triangle on the left; this means we have 3+3 = 6 extra from the top base, which gives us b₂ = 10+6 = 16:
A = 1/2(10+16)(15) = 1/2(26)(15) = 13(15) = 195
