1 Answer

Limmen · Answer 1 · 2023-11-15T08:36:47+0000

A. You need to know the circumference formula:

$C=2\pi r$

Replace r (4in):

$C=2\pi(4in)=25.1in$

B. You need to know the arc of a circle formula:

$s=\theta r$

The angle is in radians so convert 60° to radians

Remember that 180° are pi radians so:

$60°*(\pi)/(180°)=(1)/(3)\pi rad$

Replace the angle in radians and the radius (4in)

$s=(1)/(3)\pi *4in=4.2\text{ in}$

Please log in or register to add a comment.