To complete the sentence, we need to recognize a key fact about angles around a single point.
When you're dealing with angles around a point, imagine a full circle. A circle measures 360 degrees. Hence, every time you go around a point once, you're completing a circle and thus covering 360 degrees in total.
So, the correct number to fill in the blank to complete the sentence is 360.
Here is the sentence with the correct number filled in:
(a) Angles around a point add up to 360 degrees.
