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24-02-2021
Mathematics

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Аноним Аноним

24-02-2021

Answer:

The sum of angles is 180°.

:. 90° + 50° + x° = 180°

140° + x° = 180°

x = 140° - 180°

:. x = 40°

:. The missing angle = 40°

Step-by-step explanation:

:. = therefore

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