## Calculus: Early Transcendentals 8th Edition

$\frac{2}{3}$ radians
We use the formula $s=θr$. We solve the formula for $θ$: $θ=\frac{s}{r}$. We plug in the given values and simplify: $θ=\frac{1}{1.5}=\frac{2}{3}$ radians.