Question

how to do this question a and b ​

Answer 1

Answer:

It can be done by linear axiom method

Step-by-step explanation:

a+65=180.

a==180-65

a=115

Answer 2

Step-by-step explanation:

a+ 65°=180 °( adjacent angles on the straight line )

a=180°-65°=115°

∠AOC+∠COD+∠DOB=180°( adjacent angles on the straight line )

a+90°+30°=180°

a + 120°=180°

a = 180°-120°

a=60°