A tool that surveyors use to measure distances is called a trundle wheel.

1. How does a trundle wheel measure distance?

2. Why is this method of measuring distances better than the methods we used earlier?

3. How could we construct a simple trundle wheel? What materials would we need?

Your teacher will give you some supplies. Construct a trundle wheel and use it to measure the length of the classroom. Record:

1. The diameter and circumference of your trundle wheel.

2. The number of clicks across the classroom.

3. The length of the classroom.

Be prepared to explain your reasoning.