# Math

One angle of a triangle measures 100. the other two angles are in a ratio of 3:5. What are the measures of those two angles?

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1. let the two unknown angles be 3x and 5x

3x + 5x + 100 = 180
......

take over

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posted by Reiny

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posted by dhruv
3. 3x+5x+100=180
-100 -100
3x+5x=80
8x=80
x=10
3(10)=30
5(10)=50

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4. thank you for your generous donation

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5. let the ratio be 3x ,5x
the sum of all angles of triangle = 180
3x + 5x + 100 = 180
8x = 180 -100
x = 80/8
x = 10
now,
3x = 3 x 10
= 30
5x = 5 x 10
= 50

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