Find the degree measure of adjacent angles if you know that the ratio of their degree measures is 4: 5

univerkov | December 1, 2020 | education

1) Adjacent angles add up to 180 degrees
ABC + CBD = 180
2) total of 9 parts (4 + 5)
Then the angle ABC = 180/9 * 4 = 80 degrees
CBD angle = 180/9 * 5 = 100 degrees
80 + 100 = 180

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