Question

please answer this question as fast as you can because I don't know the answer who have answered it will get hundred points ​

Answer 1

Answer:

d.... 20° is the right answer......

Step-by-step explanation:

hope it will help you

please mark as brainlist plz plz plz plz plz

Answer 2

option D)

20°

Step-by-step explanation:

A +B+C=180°

so,

B/2 + B + 3B =180°

A=B/2

B=B

C=3B

so,

9B=360°

B=40°

so,

A=B/2

A=20°