Question

which formula finds the area of a trapezoid?
$a=\frac{a+b}{2}+h$
$a=\frac{1}{2}+b+h$
$a=2b×h$
$a=\frac{a+b}{2}×h$

Explanation:

Step1: Recall trapezoid area formula

The area of a trapezoid is calculated by averaging the lengths of the two parallel sides (denoted $a$ and $b$) and multiplying by the height ($h$) of the trapezoid.

Step2: Match to correct option

Compare the standard formula to the given choices. The standard formula is $A=\frac{a+b}{2} \times h$, which matches the red option.

Answer:

D. $A=\frac{a+b}{2} \times h$