**A Potpourri of Science Ideas**
**Group Mini Teach**
**Finding Pi**
Foreman, Dorothy Joplin School
**Objective:**
To measure the circumference and the diameter of various cylinders,
and to use the ratio C/D to find pi.
**Apparatus Needed:**
metric rulers, string, graph paper, tape, cylinders of various sizes.
**Recommended Strategy:**
Roll the cylinders one complete revolution and measure the distance
traveled. Use string to measure the diameter. Make a data table. Make
a pi graph. Use the pi graph to calculate the constant ratio pi.
(Students should discover a direct proportion between the variables).

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