Masking Tape Fun – Measuring Angles using a Protractor

This lesson was contributed by:

Amanda Cilia

This lesson is for:

Lesson Duration:

60 mins.

What should you expect from this lesson?

Whilst having fun with masking tape our young mathematicians will show us that they can estimate, sort, measure and draw / make angles up to 180 degrees using a protractor.

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How to carry out this lesson at home:

Resources:
• masking tape
• table / whiteboard / flat surface covered if cannot be easily wiped
• whiteboard marker
• protractor

Lesson Description:
1.  First watch this video with the pupil to see how we can use a protractor to measure angles.
2.  Next tell the pupil that he has to use strips of masking tape to ‘draw’ lines on a flat surface, such as a table, whiteboard etc. It is important that the pupil understands that the tape has to be straight and goes across the table / whiteboard from one side to the other. The lines have to cross each other at least at one point.
3. Now you should have a surface full of angles. Ask the pupil to grab a whiteboard marker and protractor and start measuring as many angles as he / she could).

4. While doing so discuss how we can classify these angles. Are they acute, obtuse, right-angle?
5. You can also discuss how if for example you can find an adjacent angle to a known angle on a straight line without using a protractor, if the pupil knows that angles on a straight line add up to 180 degrees. Same goes for the total sum of angles in a triangle. If the pupil knows that they add up to 180 degrees and two angles are known than he / she can easily find the third one.

All the resources you need to carry out this lesson at home:

Featured Video of the lesson:

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