Module 3

Module 3: Linear Measure

 

Lesson 2: The Circle

 

Focus

 

One of the most photographed buildings in Inuvik, Northwest Territories, is what the locals call the Igloo Church. The word igloo comes from the Inuit word for home. The shape of the church looks like the snow igloos built by the Inuit for shelter.

 

Construction of the church began in 1958. The church’s builder, Brother Larocque, faced many problems. One problem was the permafrost on which the church was built. To prevent the building’s interior heat from melting the permafrost and causing the structure to shift or sink, the church was built on a deep gravel foundation. So far, the building has not moved, which is a real credit to its design.

 

The base of the church is circular and is 23 m in diameter. What would you estimate the circumference—the distance around the church—to be?

 

Lesson Questions

 

In this lesson you will explore these questions:

• How can you estimate the circumference of a circle?
• What is the formula for circumference?
• How can you apply the formula for circumference to practical situations?

Assessment

 

You will complete the Lesson 2 Assignment Booklet for assessment. Download the Lesson 2 Assignment Booklet and save the file in your course folder now. You will receive further instructions on how to complete the Assignment Booklet later in this lesson.

 

Remember to save all activities, including those that are not part of the Assignment, in your course folder.

 

Required Materials and Equipment

 

You will need the following supplies:

• a ruler or tape measure that shows imperial and SI units
• several blank sheets of letter-sized paper
• various circular objects, such as jar lids or cans of various sizes
• several metres of string, ribbon, or yarn
• a calculator

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