Equation of a Circle
Instruction Active
Determining Whether a Point Lies on a Circle
The point (0,5) lies on a circle that is centered at the
origin. Does (-3,-4) also lie on the circle?
1. Identify the radius from the graph.
rul units
r
=
x
2. Determine the distance from the center to
(-3, 4) using the distance formula.
distance =
units
-10 -8
6 H4
2
4/6
8 10
3. Compare the radius to the distance. Does the
point (-3, -4) also lie on the circle?
Dane