Question

the angle of a triangle are in the ratio 1:2:3 then the least angle

Answer 1

let the angles be 1x, 2x, 3x
then by angle sum property
1x+2x+3x =180°
6x =180°
x = 180/6
x = 30°

therefore the angles are you 1x = 30° ,
2x = 60°, 3x = 90°