Supplementary Angles Quick Check
5 of 55 of 5 Items
Question
Use the image to answer the question.
An illustration shows a horizontal line with arrows at both ends. Another line with arrows at both ends extends from top right to bottom left and intersects the horizontal line in the center. The intersecting line creates 4 angles. The angle at the top left is labeled x degrees. The angle at top right is labeled y degrees. The angles at bottom left and right below the horizontal line are not labeled.
Use the relationship between supplementary angles to determine the value of y° if x°=125° .
(1 point)
Responses
305°
305 degrees
125°
125 degrees
35°
35 degrees
55°
55 degrees
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The relationship between supplementary angles is that the sum of their measures is equal to 180 degrees. In this case, if we know that one angle (x) is 125 degrees, we can subtract that from 180 to find the measure of the other angle (y).
180 - 125 = 55
Therefore, the value of y degrees is 55°.