Unit Plan
Cuemath

Cuemath: Diameter

For Students 6th - 8th
Understand the concept of diameter by learning the definition and symbols. Check-out the solved examples for better understanding and try your hand at solving a few interactive questions at the end of the page.
Handout
Cuemath

Cuemath: Area of a Circle

For Students 9th - 10th Standards
This mini-lesson explores the area of a circle. Provides a definition, examples, and practice questions with answers.
Interactive
Calculator Soup

Calculator Soup: Circle Calculator

For Students 9th - 10th Standards
Use this circle calculator to find the area, circumference, radius, or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.
Unit Plan
Khan Academy

Khan Academy: Circumference of a Circle

For Students 6th - 8th
Find the circumference of a circle when given either the radius or diameter.Find the radius or diameter of a circle when given the circumference.Students receive immediate feedback and have the opportunity to try questions repeatedly,...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Chords in Circles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students four theorems about chords and how to apply them. Students examine guided notes, review guided practice, watch instructional videos and...
Handout
Math Open Reference

Math Open Reference: Area Enclosed by a Circle

For Students 9th - 10th Standards
A complete reference guide to the area enclosed by a circle. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 1.8 Circles

For Students 9th - 10th
Understand circles and their measurement applications.

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