Question

How do you find the lengths of the arc on a circle of radius 15 inches intercepted by the central angle `180^circ`?

Answer 1

47.14 inches
or
`15 pi "inches"`

Explanation:

`"angle"=180^@=180^@xxpi/180^@=pi`
`"radius"=15 "inches"`

Relation between arc and radius and angle
`"angle"="arc"/"radius"`
`"arc"="angle"xx"radius"=pixx15=15pi"inches"`
`"arc"=15xx22/7=47.14 "inches"`