Area of a trapezoid 

(b1 + b2) x h
2

DA = base 1 = b1 CB = base 2 = b2 h = height ExampleABCD is a trapezoid with a base b1 = 4 cm, a base b2 = 8 cm and a height h = 3 cmArea A of a trapezoid ABCD =
(b1 + b2) x h
2
=
(4 + 8) x 3
2
=
12 x 3
2
= 18 cm²
Calculate the area of a trapezoid 