## Elementary Geometry for College Students (6th Edition)

(a) $72^{\circ}$ (b) $60^{\circ}$
(a) We can find the angle determined by two consecutive lug bolts: $\frac{360^{\circ}}{5} = 72^{\circ}$ (b) We can find the angle determined by two consecutive lug bolts: $\frac{360^{\circ}}{6} = 60^{\circ}$