1). The center of the circle is (4, 2) . Its radius is 5 .
2). The center of the circle is (-2, -1) .
Its radius is √32 = 4√2 = about 5.66 .
3). The center of the circle is (0, 2) . Its radius is 3 .
4). The equation of the circle is (x - 4)² + y² = 9 .
To label a point on the circle:
-- pick any number less than the radius for 'x'
-- write it in the equation.
-- then solve the equation to find 'y' .
Now you have ' x ' and ' y '. If you did it accurately, the point is on the circle.
You can mark a dot there and write the coordinates next to it.
