Question

two supplementary angles differ by 10x .if the acute angle is 13x .find the obtuse angle.ans 120 (20,40,120)​

Answer 1

Answer:

obtuse angle=115°

13x+23x=180°

36x=180°

x=5

23x=115°

Answer 2

We know, sum of two supplementary angles=180

Given,acute angle is 13x

therefore, other obtuse angle=180-13x

According to the problem,

(180-13x)-13x=10x

=>-13x-13x-10x=-180

=>-36x=-180

=>x=5

Obtuse angle=(180-(13*5))

=180-65

=115