danielahchf danielahchf

08-10-2018
Mathematics

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Help me with this please!

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sqdancefan sqdancefan

08-10-2018

Angles B and C are alternate interior angles where transversal BC cuts parallel lines AB and CD. Thus angles B and C are equal. Angle B is 65°.

Angle AEC is the exterior angle opposite interior angles A and B, which means its value is the sum of angles A and B.

∠AEC = ∠A +∠B = 47° +65°

∠AEC = 112°

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