## Geometry: Common Core (15th Edition)

$\frac{30}{18}$ Multiply each side by $\frac{t}{18}$
You are given $\frac{30}{t}$=$\frac{18}{r}$ Multiply each side by $\frac{t}{18}$ $\frac{30}{t}$ x $\frac{t}{18}$ = $\frac{18}{r}$ x $\frac{t}{18}$ $\frac{30}{18}$=$\frac{t}{r}$