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Question

The angles of a triangle are in the ratio of 2:3:4. What is the measure of the smallest interior angle of the triangle?

A
10o
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B
20o
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C
30o
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D
40o
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Solution

The correct option is B 40o
By angle sum property, the sum of angles is 180o.
Let 2x,3x and 4x be the three angles.
2x+3x+4x=180o
9x=180o
x=20o
Smallest interior angle =2×20o=40o.

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