The sum of the measures of angle 5 and angle 6 is equal to 180° and the sum of the measures of angle 2 and angle 3 is equal to 180° because angles on a _____ _____ measure 180°.

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The sum of the measures of angle 5 and angle 6 is equal to 180 and the sum of the measures of angle 2 and angle 3 is equal to 180 because angles on a measure 18 class=