1. Lesson 3

1.2. Are You Ready?

Mathematics 20-3 Module 6

Module 6: Surface Area

 

Are You Ready?
  1. Solve the following equations.

    1. x2 = 4 Answer

    2. s2 = 9 Answer

In previous mathematics courses, you found the areas of various two-dimensional shapes using the following formulas. Not only did you use these formulas to find areas, you used them to find a missing dimension if you knew the area.

 

 

This is an illustration of area formulas.

 

Find the missing dimension in each of the following questions.

  1. The square area of the top of a sugar cube is 0.25 in2. How long is each edge? Answer

    This is a photo of sugar cubes.
    iStockphoto/Thinkstock

  2. According to the building code in Calgary, the minimum area for a basement bedroom window is 0.35 m2. If a rectangular window is 70 cm long, what is the minimum width the window can have? Answer

    This is a photo of a basement window that is partially open.
    iStockphoto/Thinkstock

  3. The area of a circular utility-hole cover is 0.385 m2. To the nearest centimetre, what is the diameter? Answer

    This is a photo of a construction worker standing on a utility-hole cover.
    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.