Central Angles

[WWE]

On my homework I have a question that says, "The points N, R, and P are on the circle below. Point M is in the center of the circle. Connect three points to form a central angle." Below the question it shows a big circle with points R, N, P, and M.
This is on a state test from 2009. My class did not learn what central angles are. Can someone please tell me what a central angle is or what it looks like?

Thanks,
WWE

[Mr. Hui]

A central angle is an angle which vertex is the center of a circle, and whose sides pass through a pair of points on the circle.

In the following figure:

angle NMP
angle NMR
angle PMR

are all central angles

[WWE]

Originally Posted by Mr. Hui

A central angle is an angle which vertex is the center of a circle, and whose sides pass through a pair of points on the circle.

In the following figure:

angle NMP
angle NMR
angle PMR

are all central angles

Please go to question 29 in the attachment below. In this figure would angle RMP be a central angle?

[Mr. Hui]

Yes angle RMP is the same central angle as angle PMR.