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Nataliya [291]
4 years ago
8

The ratio of an angle to its supplement is 3:5. Find the angle and it's supplement.

Mathematics
1 answer:
schepotkina [342]4 years ago
7 0

Givens

Call one of the angles = x

The other one is 180 - x

They are in the ratio of 3 to 5

Equation

3/5 = x / (180 - x)

Solve

3/5 = x / (180 - x)         Cross Multiply

3*(180 - x) = 5x

540 - 3x = 5x               Add 3x to both sixes

540 = 5x + 3x

540 = 8x

Divide both sides by 8

540 / 8 = x

x = 67.5

One angle is 67.5

The supplement is 180 - 67.5 = 112.5

Check

67.5/112.5 = 0.6 which is the same thing as 3/5

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