If M and N are parallel and angle 1 is 135° , what is the sum of angle 6 and angle 8?
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The sum of angle 6 and angle 8 is equal to 180°. This is because angle 6 and angle 8 are corresponding angles, and corresponding angles formed by a transversal cutting two parallel lines are congruent. Therefore, since angle 6 is equal to 135°, angle 8 must be equal to 45°. Therefore, the sum of angle 6 and angle 8 is 135° + 45° = 180°.
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