## Intermediate Algebra (12th Edition)

a) $h=\dfrac{2A}{b}$ b) $b=\dfrac{2A}{h}$
a) Using the properties of equality, in terms of $h ,$ the given formula, $A=\dfrac{1}{2}bh ,$ is equivalent to \begin{array}{l}\require{cancel} 2A=bh \\\\ \dfrac{2A}{b}=\dfrac{bh}{b} \\\\ h=\dfrac{2A}{b} .\end{array} b) Using the properties of equality, in terms of $b ,$ the given formula, $A=\dfrac{1}{2}bh ,$ is equivalent to \begin{array}{l}\require{cancel} 2A=bh \\\\ \dfrac{2A}{h}=\dfrac{bh}{h} \\\\ b=\dfrac{2A}{h} .\end{array}