May 19, 2015

Students write the equation for a circle in center-radius form, (x - a)^2 + (y - b)^2 = r^2 using the Pythagorean theorem or the distance formula.Students write the equation of a circle given the center and radius. Students identify the center and radius of a circle given the equation.Teacher and Student versions of full lesson from engageNY

- 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.