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Module 5

1. Module 5

1.13. Page 3

Mathematics 10-3 Module 5 Lesson 1

Module 5: Angles

 

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In this activity you will bisect an angle by folding paper. You will need a blank sheet of paper, a straightedge, and your protractor.

 

Try This

 

Step 1: On a blank sheet of paper, draw any angle, and name the angle ABC. Measure and record the size of ∠ABC.

 

This illustration shows angle ABC.

 

Step 2: Fold the sheet of paper to construct the bisector of ∠ABC. Label the bisector

 

Step 3: Measure and record the size of ∠ABD and ∠CBD.

 

TT 3. Explain how you formed the bisector of ∠ABC by folding paper.

 

TT 4. Give the reason why the line you labelled must be the angle bisector.

 

TT 5. State the measures of ∠ABC, ∠ABD, and ∠CBD. How are these measures related?

 

Share

 

You have now experienced one method of bisecting an angle. Share your answers with your partner or collaborate with a group. When might this technique of creating a bisector not be useful? Search the Internet for a video or lesson that shows a different method you could use to bisect an angle. Share a description of the method and the link to the video. Describe a situation where this new method might be more useful than the method you used in TT 1 to TT 5.

 

Save a copy of this Share in your course folder.