Name: Solving a formula for a variable: solution walkthrough
Uploaded: 2026-11-13
Duration: 2 min 11 s
Description: The area of a trapezoid is A = 1/2h(a + b), where h is the height and a and b are the parallel sides. Which… Try it, then watch the animated solution.

Problem 25 of 35alg-025

The area of a trapezoid is $A = \frac{1}{2}h(a + b)$ , where $h$ is the height and $a$ and $b$ are the parallel sides. Which expression gives $b$ in terms of $A$ , $h$ and $a$ ?

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Solution walkthrough2:11