To measure any angle,

We use protector.

It is also called a ‘D’

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How to use a protractor?
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So, ∠ABC = 40°

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How to use a protractor?
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So, ∠ABC = 40°
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Measure these angles with a protractor
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So, ∠1 = 80°
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So, ∠2 = 120°
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So, ∠3 = 90°
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So, ∠4 = 180°
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