Chrisalyn014viz
Answered

The diagram shows a circle with centre O and a radius of 42 cm.
A and B are points on the circumference such that arc AB makes an angle of 120°
What is the length of arc AB?

Sagot :

Jers15viz
Convert the central angle to rad
120(π/180)=2/3π


s=teita(r)
s=(2/3π)(42)
s=87.96