SOLUTION: write the measure of an angle which is twice the measure of its supplementary

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Question 892110: write the measure of an angle which is twice the measure of its supplementary
Answer by Fombitz(32388) About Me  (Show Source):
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Angle is twice its supplementary angle.
A=2S
By definition,
A%2BS=180
Substituting,
2S%2BS=180
3S=180
S=60
Then,
A=2%2860%29
A=120