Launch

Math 10C Module 1 Lesson 2

Are You Ready?

Complete these questions in your course folder (binder). If you are experiencing difficulty, you may want to use the information and the multimedia in the Refresher section to clarify concepts before completing these exercises.

  1.   What is meant by the circumference of a circle?

  2.   The formula for the circumference of a circle is C = πd. Use the formula to calculate the circumference of a circle with a diameter of 12 mm. Report your answer to the nearest tenth of a millimetre.
  3.   Put the following metric units in order from smallest to largest:

km                m                mm                cm

  4.   Put the following imperial units in order from smallest to largest:

        yard                inch                mile                foot

  5.   What is meant by the perimeter of a polygon?

  6.   Determine the perimeter of the shapes below:

Once you have completed these exercises to the best of your ability, check your work using the link provided.

Answers


If you feel comfortable with the concepts covered in the questions, move forward to Discover. If you experienced difficulties, use the resources in Refresher to review these important concepts before continuing through the lesson or contact your teacher.

Refresher

Below you will find links to some video clips that may help refresh your memory. These interactive pieces will help you to answer the following questions:

  • How do I determine the circumference of a circle?

  • How do I calculate the perimeter of a polygon or an enclosed shape with straight sides?

The multimedia lesson titled “Parts of a Circle and Circumference” reviews the parts of a circle and explores the relationships between the diameter, radius, and circumference of a circle. The value of pi is discussed, and the lesson includes a game and practical math problems that require using the formula for the circumference of a circle. (You may need to log in using username LA53 and password 4487).


The LearnAlberta resource from the Mathematics Glossary defines the term perimeter.

Go to “Perimeter”.

It contains an animation to illustrate the definition. Try “Example” at the bottom of the web page.

Materials

  • measuring tapes and rulers

  • 30-cm long string

  • 3-D modelling program (e.g., Google SketchUp)