The area of a trapezoid can be calculated using the formula A=12h(b1+b2), A=\dfrac{1}{2}h \left( b_1+b_2 \right), A=21h(b1+b2), where b1b_1b1 and b2b_2b2 represent the lengths of the trapezoid's bases and hhh is the distance between the bases.