Pi Day Math Activity Circumference Discovery Lesson

What others say

"My students found this resource engaging and rigorous, and I found it simple to implement. Thank you!"

Hannah T.

"This was a fun activity for students to make connections and understand circles, especially on pi day."

LINDSEY C.

Description

In this inquiry lesson, students get to measure circles and discover the relationship between circumference and diameter!

They measure circles in the classroom (or that they bring from home), graph a scatterplot, make connections, and discover the formula for a circle's circumference.

The two-page handout guides student through the activity. It includes:

vocabulary
measuring circles' diameters and circumferences with string
making a graph
observations
making predictions & improving solutions
practice with the circumference formula

The lesson is meant to help students see the relationship between circumference, diameter, and radius, so they will remember the formula. It is most appropriate for middle school, but will also reinforce the concept with high school geometry students.

The download comes with a basic lesson guide and answer key.

You will receive a PDF and an editable version in PowerPoint.

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Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Pi Day Math Activity Circumference Discovery Lesson

Name: Pi Day Math Activity Circumference Discovery Lesson
Brand: Rise over Run
SKU: 3174638
Price: 2.00 USD
Availability: InStock
Rating: 4.97 (34 reviews)

Rise over Run

33.8k Followers

$2.00

Highlights

Grades

7th - 9th

Subjects

Geometry, Graphing, Math

Standards

CCSS7.G.B.4

CCSS8.SP.A.1

What others say

"My students found this resource engaging and rigorous, and I found it simple to implement. Thank you!"

Hannah T.

"This was a fun activity for students to make connections and understand circles, especially on pi day."

LINDSEY C.

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Description

In this inquiry lesson, students get to measure circles and discover the relationship between circumference and diameter!

They measure circles in the classroom (or that they bring from home), graph a scatterplot, make connections, and discover the formula for a circle's circumference.

The two-page handout guides student through the activity. It includes:

vocabulary
measuring circles' diameters and circumferences with string
making a graph
observations
making predictions & improving solutions
practice with the circumference formula

The download comes with a basic lesson guide and answer key.

You will receive a PDF and an editable version in PowerPoint.

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.

5.0

Rated 4.97 out of 5, based on 34 reviews

34
ratings

Mostly used with 7th grade

Reviews

5th

6th

7th

8th

9th

10th

11th

All verified TPT purchases

Great Fun!

Rated 5 out of 5

August 20, 2025

My students had a good time with this on Pi Day! Thanks!

Amanda Barton

(TPT Seller)

629 reviews • Virginia

Grades taught: 9th

Rated 5 out of 5

July 21, 2025

My students found this resource engaging and rigorous, and I found it simple to implement. Thank you!

Hannah T.

237 reviews

Grades taught: 7th

Student populations: Learning difficulties

Rated 5 out of 5

May 7, 2025

This was a fun activity for students to make connections and understand circles, especially on pi day.

LINDSEY C.

264 reviews

Grades taught: 5th, 6th, 7th, 8th

Rated 5 out of 5

September 20, 2024

Thank you for sharing this resource. Saved me some time! Perfect for my 7th grade teacher toolkit.

Melissa Hernandez

(TPT Seller)

2,007 reviews

Grades taught: 7th

Rated 5 out of 5

June 26, 2024

I use many items to create my year long curriculum and this fits my classroom perfectly.

Ashley T.

1,793 reviews

Grades taught: 6th

Rated 5 out of 5

May 7, 2024

This was a nice hands on project to do on "Pi Day" as a Geometry review and way to introduce scatterplots.

I Literally Cannot Even

(TPT Seller)

151 reviews

Grades taught: 8th

Rated 5 out of 5

April 5, 2024

We used this activity as one of our Pi Day stations and the students loved it. They were all able to complete the activity, even those who were not familiar with the circumference formula.

Elizabeth Nixon

(TPT Seller)

436 reviews

Grades taught: 7th

Rated 5 out of 5

August 18, 2023

My students loved this activity! This was a great review for them.

Jennifer Hendrix

(TPT Seller)

667 reviews

Grades taught: 8th

Questions & Answers

Standards

to see state-specific standards (only available in the US).

CCSS7.G.B.4

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

CCSS8.SP.A.1

Construct and interpret scatter plots for bivariate measurement data to investigate patterns of association between two quantities. Describe patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association.