Pi Day Activity

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

Learn Together

Let's look together at the circumference of a circle with the diameter of 5.

Practice #1

Make a circle with a diameter of 5.25 cm. Use the "unroll bar" and move the circle along the ruler to measure the circumference. Write the measured cm below.

Practice #2

Make a circle with a diameter of 7.8 cm. Use the "unroll bar" and move the circle along the ruler to measure the circumference. Write the measured cm below.

Practice #3

Make a circle with a diameter of 10.5 cm. Use the "unroll bar" and move the circle along the ruler to measure the circumference. Write the measured cm below.