Question

A triangle has angle ratio 1:2:3 then smallest angle value?

Answer 1

let the angles be x,2x,3x 
sum of all the angles in a triangle is 180°
x+2x+3x=180°
6x=180°
x=180°/6
x=30°
Now,the angles are x=30°
2x=2(30°)=60°
3x=3(30°)=90°
Therefore,the smallest angle is 30°

Answer 2

ratio=1:2:3
=6x
total=180
6x=180
x=180/6
   =30

angle 1=1*30 = 30
angle 2 = 2*30 = 60
angle 3 = 3*30 = 90

so, the smallest among them is 30 degree angle