1. Lesson 2

Mathematics 20-3 Module 6

Module 6: Surface Area

 

Lesson 2: Estimating Surface Area

 

Focus

 

Solar panels are becoming increasingly common for both urban and rural use. The cells in the panels convert light from the sun into electrical energy. The amount of electricity produced depends on the surface area covered by the panels. Solar energy technicians help design and install systems like the ones shown in the photos. What area would you estimate each panel covers? A square metre? Less? More? Are there objects in the pictures you could use to help with your estimate? In this lesson, you will refine your skills in estimating surface area.

 

This is a photo of solar panels on a roof and a photo of a solar energy technician.

both photos: iStockphoto/Thinkstock

 

Lesson Questions
  • How are different strategies used to estimate surface area?

  • How can a referent be used to estimate surface area?
Assessment

 

Your assessment for this lesson may include a combination of the following:

  • course folder submissions from Try This and Share

  • your contribution to the Mathematics 20-3: Glossary Terms and Formula Sheet

  • Lesson 2 Assignment (Save a copy of your lesson assignment to your course folder now.)

  • the Project Connection
Materials and Equipment
  • an old newspaper
  • scissors
  • tape
  • rulers (SI and imperial)
  • calculator
  • 1-cm Grid Paper
Time

 

This lesson has been designed to take 150 minutes; however, it may take more or less time depending on how well you are able to understand the lesson concepts. It is important that you progress at your own pace based on your own learning needs.