## Thinking Mathematically (6th Edition)

$b=\frac{2A}{h}$.
The provided formula is$A=\frac{1}{2}bh$ and now solve the formula for $b$ by multiplying both the sides by $\frac{2}{h}$ \begin{align} & A=\frac{1}{2}bh \\ & \frac{2}{h}\times A=\frac{{}}{{}}\times \frac{1}{{}}b \\ & b=\frac{2A}{h} \end{align} The formula $A=\frac{1}{2}bh$is for area of a triangle, where $A=$ area of the triangle, $b=$ base of the triangle, and$h=$ height of the triangle. The formula is$b=\frac{2A}{h}$.