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I need help on this math problem ASAP.

I need help on this math problem ASAP.-example-1
User Sonle
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1 Answer

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Answer:

This shape is a rectangle so that means that the angles are 90°. From sum of angles of a triangle, x + 3x + 10 + 90 = 180 which means 4x + 100 = 180 → 4x = 80 → x = 20°.

User Caillou
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