If the angles of a triangle are in the ratio 1 : 2 : 3, then the smallest angle is ___.

60°

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30°

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15°

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45°

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Solution

The correct option is B
30°

Let the angles be x°, 2x° and 3x°

Sum of angles = 180°

x + 2x + 3x = 180

6x = 180

x = 30°

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