Question

The measure of central angle of circle is 150° and the radius of circle is 21 cm. To find the length of the arc complete the following activity.

Length of arc = `l = θ/(360^circ) xx square`

= `(150^circ)/square xx square xx 22/7 xx 2`

= `square` cm

Answer 1

Length of arc = `l` = \[\frac{θ}{360°} \times \boxed{2πr}\]

= \[\frac{150°}{360°} \times \boxed{21} \times \frac{22}{7} \times 2\]

= \[\boxed{55}\] cm