Prove that some of all angle of a triangle 180°
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there are 3 angles in a triangle
so, 3x+3x+3x= 180
9x= 180
x= 180/9 =20 degree
thus we prove that sum of all angles in a triangle is 180 degree.
hope it helps pls mark as brainliest
so, 3x+3x+3x= 180
9x= 180
x= 180/9 =20 degree
thus we prove that sum of all angles in a triangle is 180 degree.
hope it helps pls mark as brainliest
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