# Measuring Circumference and Diameter Class Activity

## What is the relationship between the diameter and the circumference of a circle?

## Practice #1 (Part 1)

Step 1: Make a circle with a diameter of 3 cm. Predict the circumference of the circle below

## Practice #1 (Part 2)

Step 2: Use the "unroll tab" and move the circle along the ruler to measure the circumference. Write the measured cm below

## Practice #2 (Part 1)

Step 1: Make a circle with a diameter of 5 cm. Predict the circumference of the circle below

## Practice #2 (Part 2)

Step 2: Use the "unroll tab" and move the circle along the ruler to measure the circumference. Write the measured cm below

## Practice #3 - Word Problem

The diameter of Sachin and Lily’s school logo is 18.4 cm. About how long is its circumference?