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Two supplementary angles have measures of 9x degrees and 3x degrees. What is the measure of the longer angle?
- 180 degrees
- 45 degrees
- 135 degrees
- 15 degrees
Supplementary angles must add up to 180 degrees. Using that logic, you can solve for x.
9x 3x = 180 12x = 180 x = 15
Now plug 15 in to 9x and 3x individually, and your two angles will be 135 degrees and 45 degrees. Answer 3 is correct since you want the longer angle. More question:
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