Ava45018
Ava45018
08-02-2018
Mathematics
contestada
Geometry help please
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sqdancefan
sqdancefan
08-02-2018
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°
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