Answer:
We know ahen two angle adding together and form of angle 90 , then they both are complement to each other .
So,
Let complement angle = x
i ) x + 20 = 90
x = 70
So 70 is the complementary angle of 20 ( Ans )
ii ) x + 35 = 90
x = 55
SO 55 is the complementary angle of 35 ( Ans )
iii ) x + 90 = 90
x = 0
So, 0 is the complementary angle of 90 ( Ans )
iv ) x + 77 = 90
x = 13
So, 13 is the complementary angle of 77 ( Ans )
v ) x + 30 = 90
x = 60
So, 60 is the complementary angle of 30 ( Ans )