If angles of a triangle are in the ratio of 2 : 3 : 4, then the measure of the smallest angle is:
Answer & explanation
Correct answer: option 3
Sum of all the three angles of a triangle = 180º
Angles of a triangle are in the ratio of 2 : 3 : 4
So,
( 2 + 3 + 4 )R = 180º
9R = 180º
1R = 20º
Smallest angles of triangle = 2R = 2 × 20º = 40º