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Circle Equation

Author:Gabriel Cheow

Equation of Circle in Standard Form

In this section, we will learn about the equation of circles in standard form.

In the applet below, play around with the sliders h, k, and r. Observe how each of these variables control different aspects of the circle.

What does the variable h in control?

Select all that apply

A
x-coordinate of the center of the circle.
B
y-coordinate of the center of the circle.
C
radius of the circle

Check my answer (3)

What does the variable k in control?

Select all that apply

A
x-coordinate of the center of the circle.
B
y-coordinate of the center of the circle.
C
radius of the circle

Check my answer (3)

What does the variable r in control?

Select all that apply

A
x-coordinate of the center of the circle.
B
y-coordinate of the center of the circle.
C
radius of the circle

Check my answer (3)

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