May 19, 2015

<p>Writing and Graphing the Equations of Circles</p><p>Learning Objectives:<br/>Graph a circle.<br/>Find the equation of a circle in the coordinate plane.<br/>Find the radius and center, given the equation of a circle and vice versa.<br/>Find the equation of a circle, given the center and a point on the circle.</p><p>Lesson, videos, exercises, and text from CK-12. <br/>Additional resources available at this site.</p>

- Mathematics > General
- Mathematics > Geometry

- Grade 9
- Grade 10

Reason abstractly and quantitatively.

Model with mathematics.

Use appropriate tools strategically.

Attend to precision.

Look for and make use of structure.

Derive the equation of a circle of given center and radius using the Pythagorean Theorem; complete the square to find the center and radius of a circle given by an equation.