Question

if two supplementary angles are in the ratio 7:11,then the angles are

Answer 1

let the angles be 7x and 11x
then 7 x + 11x = 180
18x = 180
x = 180 / 18
x =10
therefore angles are 7× 10 = 70°
11 × 10 = 110 °

Answer 2

Let the angles be 7x,11x
As the angles are supplemantry
Therefore 7x + 11x =180
Or x = 10
Therefore the angles are 70,110