Question

The center of a circle is at the origin. An endpoint of a diameter of the circle is at (-3, -4). How long is the diameter of the circle?
5
10
25

Answer 1

A diagram helps most of the time!

Answer 2

hint:
The center of your circle is at the origin :)
meaning that the point (0 ,0) is right in the center of your circle.
Since we know that an endpoint is (-3, -4)

Draw out a picture because it might help you see it visually.