To draw a pair of adjacent supplementary angles, start by drawing a straight line, which will serve as one side of both angles. Choose one angle measure, and use a protractor to measure that angle from the line, marking its vertex. Then, since supplementary angles add up to 180 degrees, subtract the given angle measure from 180 to find the measure of the second angle. From the vertex, use the protractor to measure and mark the second angle adjacent to the first, ensuring they share a common side along the straight line.
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