I will give you a Brainly crown if it is right. Will you help me

Answer:
The answer is 70 degrees, b= 70 degrees.
Answer:
B = 70
Step-by-step explanation:
It is a complementary angle meaning it is 90 degrees
If a is 20, then that means to find b you have to subtract from 90.
90 - 20 = 70
b = 70