Circle O has a radius of 8 m and the measure of central angle AOB is 45 degrees.

Which of the following could be used to calculate the length of arc AB?

The arc AB is 1/8 of the circumference. That would be pi*R/4

2pi

To calculate the length of arc AB, you can use the formula:

Length of arc = (angle / 360) * 2 * π * radius

In this case, the radius of circle O is given as 8 m and the measure of angle AOB is given as 45 degrees. So, substituting these values into the formula, we get:

Length of arc AB = (45 / 360) * 2 * π * 8

Simplifying further:

Length of arc AB = (1/8) * 2 * π * 8

Length of arc AB = π * 8

Length of arc AB = 8π

Therefore, the length of arc AB is 8π meters.

To calculate the length of arc AB in circle O, we can use the formula:

Arc Length = (Central Angle / 360 degrees) * 2 * π * Radius

Given that the radius of circle O is 8 m and the central angle AOB is 45 degrees, we can substitute these values into the formula:

Arc Length = (45 degrees / 360 degrees) * 2 * π * 8 m

Simplifying this expression, we get:

Arc Length = (1/8) * 2 * π * 8 m

Arc Length = π m

Therefore, the length of arc AB is π m (approximately 3.14 m).

So, the correct answer would be "π times the radius".