Question

The center of a circle is (1, 2) and a point on the circle is (4, 2).

Find the radius of the circle.
Write the standard equation of the circle.
Graph the circle.

Answer 1

3

Explanation:

Radius = √(x2-x1)^2+(y2-y1)^2

=√1-4)^2+(2-2)^2

√9-0

√9

=3 units