## Denebel Group Title On a circle of radius 10, how long is an arc that subtends a central angle of 4pi/5 radians? 2 years ago 2 years ago

1. UnkleRhaukus

length of circumference is $$2 \pi r$$ length of arc is $\frac{2 \pi r}\theta$ where $$\theta$$ is the angle the arc subtends