Question

If ( a+10) and (a+20) are supplementary angles, find them this is supplementary angle so it will be 180 degree​

Answer 1

Answer:

angles are 85° and 95°

Step-by-step explanation:

(a+10)+(a+20)=180°

2a+30=180°

2a=180°-30°

2a=150°

a=150°/2

a=75

a+10=75+10=85°

a+20=75+20=95°

Answer 2

Step-by-step explanation:

(a+10)+(a+20)=180

=>a+a+10+20=180

=>2a=180-(20+10)

=>2a=180-30

=>a=150/2b

=>a=75

so a+10=75°+10°=85° and a+20=75°+20°=95°