Lesson 11
Building a Trundle Wheel
Let’s build a trundle wheel.
11.1: What Is a Trundle Wheel?
A tool that surveyors use to measure distances is called a trundle wheel.
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How does a trundle wheel measure distance?
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Why is this method of measuring distances better than the methods we used in the previous lesson?
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How could we construct a simple trundle wheel? What materials would we need?
![A picture of a trundle wheel.](https://cms-im.s3.amazonaws.com/KEsW4F93XTL7U9zxjo7icb4a?response-content-disposition=inline%3B%20filename%3D%227-7.9.C2.Image.04.png%22%3B%20filename%2A%3DUTF-8%27%277-7.9.C2.Image.04.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240630%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240630T162344Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=b0e479130fd89755a16133418b6e5a996a0d6e9e8712fe6e504cd6824efb177d)
11.2: Building a Trundle Wheel
Your teacher will give you some supplies. Construct a trundle wheel and use it to measure the length of the classroom. Record:
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the diameter of your trundle wheel
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the number of clicks across classroom
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the length of the classroom (Be prepared to explain your reasoning.)