Question

If the center of a circle is (1, 1), and it has a radius of 5, which is another point on the circle?

A)
7,1)
(1,-5)
(4,5)
(-2,6)

Answer 1

(4,5)

Explanation:

The equation of a circle that has centre coordinates (a,b) and radius r is

(x-a)^2+(y-b)^2=r^2

so (4,5) satisfy the equation

3^2+4^2=9+16=25