eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 8.2 Area and Circumference of Circles

For Students 9th - 10th Standards
A deep dive into the area and circumference of circles.
Handout
Other

Simple Science: Slice of Pi

For Students 9th - 10th
The interactive tutorial explores the history behind Pi and how to find its value. Students use images of circular objects and find the diameter and circumference to obtain an approximate value of Pi. The resource has an interactive...
Activity
National Council of Teachers of Mathematics

The Math Forum: Pi Day

For Teachers 9th - 10th
Need some ideas for Pi Day on March 14th? You can get some great resources at this location. There are all kinds of links available.
eBook
Mathigon

Mathigon: Geometry: Circle and Pi: Introduction

For Students 9th - 10th Standards
This lesson focuses on the characteristics of a circle including similarity, radius, circumference, and Pi. It provides formulas to determine the area of a circle, calculating Pi, and learning exercises throughout.