Question

An arc subtends a central and measuring pi/2 radians.

What fraction of the circumference is this arc?

Answer 1

1/4th

Explanation:

This comes from knowing the unit circle in both radians and degrees. However, you could also calculate it from knowing that 360 degrees is 2
`\pi` radians. What you'll find is that
`(\pi )/(2)` radians is 90 degrees, or 1/4th of the circle. This means that an arc measuring
`(\pi )/(2)` radians will be 1/4th of the entire circumference.

I hope this helps!