Question

In circle A below, if angle BAC measures 15 degrees, what is the measure of arc BC?

Answer 1

15 degrees

Explanation:

The arc measure of BC is equal to angle created by B, C and the central angle. The angle created by B,C, and the central angle is 15 degrees so the arc measure is 15 degrees.

Answer 2

Answer: 15°

Explanation:

It is important to remember that, by definition:

`Central\ angle = Intercepted\ arc`

Therefore, in this case, knowing that the angle BAC (which is the central angle) in the circle provided measures 15 degrees, you can conclude that the measure of arc BC (which is the intercepted arc) is 15 degrees.

Then you get that the answer is:

`BAC=BC`

`BC=15\°`