Question

how do i find the radius of a circle w the center 5,6 and a point on the circle is 9,11?

Answer 1

use the following equation
\[radius=\sqrt{(x1-x2)^{2}+(y1-y2)^{2}}\]suppose P1(x1,y1)=(5,6) and that P2(x2,y2)=(9,11).