91Ó°ÊÓ

Find the diameter of a circle whose circumference is \(628 \mathrm{ft}\). [Use \(\pi=3.14\) ]

The ratio of the circumference of two circles is \(3: 2\). The smaller circle has a radius of \(8 .\) Find the length of a radius of the larger circle.

Let \(\mathrm{AB}\) be an arc of a circle whose center is \(0 . \mathrm{AB}\) is of length 11 , and \(\mathrm{m} \angle \mathrm{AOB}=10^{\circ}\). (The length of a circular arc is proportional to the central angle which cuts the arc.) a).Compute the circumference of the circle. b). Approximating \(\pi\) by \(22 / 7\), compute the diameter of the circle.