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Year 11 maths · E.1 · Angles

Find complements and supplements

Complements add to 90°, supplements add to 180°.

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  1. An angle measures 83°. What is the measure of its complement?

    Answer: 7

  2. An angle measures 42°. What is the measure of its complement?

    Answer: 48

  3. An angle measures 16°. What is the measure of its complement?

    Answer: 74

Tip: Complements add to 90°, supplements add to 180°.

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