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Line a is parallel to line b, m 6=85 and m 3=2x. Find m 1.

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The sum of the angles <6 and <3 must be 180. Since <3 and <1 are opposed to the top, their measure are equal. We need then to calculate the measure of angle >3 = 180 - <6 = 180-85=95

m(<1) = 95

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