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Angles and polygons
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4 votes
Angles and polygons

Angles and polygons-example-1
User Mcfroob
by
5.1k points

1 Answer

2 votes

Answer:

∠1 = 66°

Explanation:

∠1 + ∠3 = ∠4 (exterior angle theorem)

∠1 + 57° = 123°

∠1 = 66°

User Mohanasundar
by
6.1k points
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