The smallest angle in a triangle with angles in ratio 1:2:3 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°
Hence the measure of the smallest angle is 30°

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Angles of a triangle are in ratio $1 : 2 : 3$ , then the greatest angle is what times smallest angle.

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