Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Gmd Circumference of a Circle

For Teachers 9th - 10th Standards
For this task, students are asked to explain the formula for finding the circumference of a circle. Aligns with G-GMD.A.1.
eBook
Mathigon

Mathigon: Geometry: Circle and Pi: Degrees and Radians

For Students 9th - 10th Standards
Rather than dividing a circle into some number of segments (like 360 degrees), mathematicians often prefer to measure angles using the circumference of a unit circle - a circle with radius 1. This way of measuring angles is called...
Interactive
PBS

Pbs Learning Media: Square Wheeled Tricycle: Radius and Circumference

For Students 6th - 8th
This interactive exercise focuses on working with the radius of various circles to find the circumference and area as well as challenging you to find the distance a square wheel travels around the track.
Lesson Plan
PBS

Pbs Learning Media: Formulas: Targeted Math Instruction

For Teachers 9th - 10th Standards
At the end of this lesson plan about formulas, students will be able to identify and apply the correct formula for a given situation, solve for any unknown component of the formulas for perimeter, circumference, and area of regular and...
Handout
Math Open Reference

Math Open Reference: Radius of a Circle

For Students 9th - 10th Standards
Learn about the radius of a circle with this useful reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Gmd Area of a Circle

For Teachers 9th - 10th Standards
For this task, students investigate and develop an understanding of the formula for the area of a circle. Aligns with G-GMD.A.1.
Lesson Plan
Alabama Learning Exchange

Alex: Discovering Pi

For Teachers 6th - 8th
This activity allows students to discover the number Pi. By measuring real life objects, students will get to see where the number Pi comes from as well as how the circumference formula is derived.This lesson plan was created as a result...