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Geometry help please
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5 votes
Geometry help please

Geometry help please-example-1
User Kbjorklu
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1 Answer

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You know angles B and C are both 60°, the values of the angles in an equilateral triangle. Since the sum of angles in a quadrilateral is 360°, you have
B + C + x + y = 360°
60° +60° + x + y = 360°
x + y = 240°
User Perrier
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