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Interior and exterior triangle angles
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Interior and exterior triangle angles

Interior and exterior triangle angles-example-1
User Justin Jackson
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1 Answer

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we know that sum of all angles in a triangle is 180°

6x+10+2x+5+3x-11 = 180

11x + 4 = 180

11x = 176

x= 16

angle R = 6×16+10 = 96+10 = 106°

User Melounek
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