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Question
Angles of a triangle are in the ratio 2 : 4 : 3. The smallest angle of the triangle is
Options:
A .  40∘
B .  30∘
C .  60∘
D .  80∘
Answer: Option A
:
A
The sum of all the three angles of a triangle = 180
Since the angles are in the ratio 2: 4 : 3, let x be a factor such that,
2x + 4x + 3x=180
=> 9x = 180
=> x = 20
Hence the three angles of the triangle are:
=> 2x= 40
=> 4x= 80
=> 3x= 60
So the smallest angle in the given triangle is 40.

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