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Find the angles a,b,c |
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Answer» Step-by-step explanation: external angle = sum of 2 opposite internal ANGLES c+55 = 72+a 72+a+b=180 sum of angles in a triangle =180° c+b+55=180° angle at a POINT on STRAIGHT line =180° angle a=55 corresponding angles are EQUAL 72+55+b=180° b= 53 c+55=72+55 c=72 |
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