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  1. The ratio of the angles of a triangle is 1 :
    2
    : 3 .Then the smallest angle is :
    3
    1. 21
      7
    2. 25°
    3. 25
      7
    4. 38
      7
Correct Option: C

As per the given in question,
In a ∆ ABC,

∠A : ∠B : ∠C = 1 :
2
: 3 = 3 : 2 : 9
3

Sum of the terms of ratio = 3 + 2 + 9 = 14
∴ Lowest angle = ∠B =
2
× 180°
14

Lowest angle = ∠B =
180°
= 25
77



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