Question

IF (a+10)° (a+20°) are supplementary angle find them​

Answer 1

Answer:

$(a + 10) + (a + 20) = 180 \: \: \: \: \: \: (sum \: of \: supplementary \: angles \: is \: 180) \\ 2a + 30 = 180 \\ 2a = 180 - 30 \\ 2a = 150 \\ a = 75 \\ \\ hence \: 1st \: angle \: = a + 10 = 75 + 10 = 85 \\ and \: its \: supplement \: = 180 - 85 = 95$

Answer 2

Step-by-step explanation:

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

=>a+a+10+20=180

=>2a=180-(20+30)

=>2a=180-50

=>a=130/2

=>a=65

so a+10=65°+10°=75° and a+20=65°+20°=85°