Question

Write the equation of the circle with center (-2, -5) and containing the point (-10, -20).

Answer 1

(x+2)(y+5)=289

Answer 2

equqtion of circle with centre (-2,-5) is (x+2)^2+(y+5)^2=c.substitute (-10,-20) in this equtation. and get c value.

Answer 3

The distance from the center to a point on the circle is the radius.
you could use the distance formula to find the radius squared