Easel by TpT
Seamlessly assign resources as digital activities

Learn how in 5 minutes with a tutorial resource. Try it Now  


Interactive resources you can assign in your digital classroom from TpT.
Learn about Easel

Easel Activities
Pre-made digital activities. Add highlights, virtual manipulatives, and more.
Easel Assessments
Quizzes with auto-grading that will be available for purchase on TpT soon.

Geometry - Building Understanding for the Equation of a Circle

Grade Levels
9th - 11th
Resource Type
Formats Included
  • PDF
  • Activity
7 pages
Share this resource
Includes Easel Activity
This resource includes a ready-to-use interactive activity students can complete on any device. Easel by TpT is free to use! Learn more.


Using three drawings of a circle, students develop the equation of a circle.

• Students first find 4 easy points that are 5 units from the center of a circle.

• Next the students use the Pythagorean Theorem to find that eight other points are also 5 units from the center.

• Then the students use another circle to show that for any point (x,y) on the circle the Pythagorean Theorem leads to an equation for a circle.

• Finally students discover that, in general, there is a general form for the equation of a circle.

An answer key is provided.

Comment from Buyers:

• This was a great product for explaining the equation for a circle!

• Absolutely love your bundles! I can always depend on your products for quality curriculum!

Total Pages
7 pages
Answer Key
Teaching Duration
Report this Resource to TpT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TpT’s content guidelines.


Questions & Answers

Teachers Pay Teachers is an online marketplace where teachers buy and sell original educational materials.

More About Us

Keep in Touch!

Sign Up