Question

A circle has its centre at (0,0) and passes through the point (-9,40).

a) Calculate the radius of the circle.
b) State the equation of the circle.
c) State the x and y-intercepts.
d) Is the point (12,18) inside, on or outside this circle?

Answer 1

Explanation:

Radius of a cicke is calculated by 2 pi r

Equation is found by y=mx+C