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Linear Pair

Ratio of two ...

Question

Ratio of two angle of a linear pair is 7:5.Find the angles

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Solution

Let the two angles be 7x and 5x
7x + 5x = 180 (linear pair)
12x =180
x=180/12
x=15

Angles
7x=105
5x=75
So the angles are 105° and 75°

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