Question

What is the general form of the equation of a circle with its center at (-2, 1) and passing through (-4, 1)?

Answer 1

All you need is the radius.

Answer 2

how do i get the radius?

Answer 3

So, you're NOT going to find the radius?

Answer 4

i dont know how to get the radius. thats why im asking

Answer 5

Bad answer. You MUST have SOME idea. If you have the center and a point on the circle, you must be able to find the radius. You Will be required to do this on an exam.

Two points. How far apart are they?

Answer 6

2

Answer 7

i use midpoint formula?