the formula for area of a trapezoid is
[tex] \frac{(b1 + b2) \times h}{2} [/tex]
so you add up the bottom base (17) and the top base (3) to get 20.
you then take the sum of the bases (20) times the height (8) to get 160.
lastly, you take 160 ÷ 2 to get your final answer, which is 80 (:
