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Lesson 1

1. Lesson 1

1.2. Are You Ready?

Mathematics 20-3 Module 6

Module 6: Surface Area

 

Are You Ready?

 

In previous mathematics courses, you found the area of various two-dimensional shapes. Hopefully you recall using these formulas.

 

These are illustrations of area formulas.

  1. Find the area of one side of a sheet of standard copy paper. Express your answer to the nearest tenth of a square inch. Answer

    In this photo, two hands hold a standard sheet of paper.
    iStockphoto/Thinkstock

  2. A circular no-entry sign is 45 cm in diameter. What is the area of the sign’s front side? Round your answer to the nearest square centimetre. Answer

    This photo is of a circular no-entry sign.
    iStockphoto/Thinkstock

  3. The trapezoidal window outlined in blue on the photo has the dimensions outlined by the graphic. What area of glass is needed to fill the window? Answer

    In this photo, a house has a gable end with windows. This diagram shows the dimensions of a trapezoidal window. The bottom edge measures 60 cm, the left edge measures 50 cm, the right edge measures 20 cm, and the top slanted edge measures 67 cm.
    iStockphoto/Thinkstock

If you answered the Are You Ready? questions without any issues, move on to Discover.

 

If you had some difficulty with the Are You Ready? questions, complete Refresher.