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18-11-2020
Mathematics

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If m<3=105, what is the m<21 that will prove that lines P and R are parallel. please help

If mlt3105 what is the mlt21 that will prove that lines P and R are parallel please help class=

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Аноним Аноним

18-11-2020

Answer: 75°

have: m∠3 = m∠11 = m∠22 = 105°

but m∠22 + m∠21 = 180°

=> m∠21 = 180° - 105° = 75°

Step-by-step explanation:

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