### Home > A2C > Chapter 5 > Lesson 5.2.1 > Problem 5-72

5-72.

Give the equation of each circle below in graphing form.

A circle with center

and radius . Remember the general equation for a circle is

where is the center. A circle with center

and radius . See part (a).

A circle with equation

.

Complete the squares for *x* and *y*.

Rearrange the equation:

Use the eTool below to graph the equations for each part.

Click the link at right for the full version of the eTool: A2C 5-72 HW eTool