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6-8 Accelerated 6 Unit 9 Lesson 15

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K-5 Math •6-8 Math 9-12 Math

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•Accelerated 6 Accelerated 7

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Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8 •Unit 9

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Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 •Lesson 15 Lesson 16 Lesson 17

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Unit 3
Unit 4
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Unit 6
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Curriculum

IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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Lesson 15

15.1 Activity 15.2 Activity

Unit 9, Lesson 15

Building a Trundle Wheel

Accelerated 6

15.1

Activity

What Is a Trundle Wheel?

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

How does a trundle wheel measure distance?
Why is this method of measuring distances better than the methods we used earlier?
How could we construct a simple trundle wheel? What materials would we need?

A picture of a trundle wheel.

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15.2

Activity

Building a Trundle Wheel

Standards Alignment

Building On

Addressing

7.G.4

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

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7.RP.A

Analyze proportional relationships and use them to solve real-world and mathematical problems.

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Building Toward

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

The diameter and circumference of your trundle wheel.
The number of clicks across the classroom.
The length of the classroom.

Be prepared to explain your reasoning.

Are You Ready for More?

Glossary

None

Standards Alignment

Building On

7.G.4

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

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Addressing

Building Toward