Question

a and b are complementary if = 78 then b =​

Answer 1

Answer:

12

Step-by-step explanation:

Sum of Complementary Angles= 90 degree

Therefore, 90= a+b

78+b=90

Therefore b= 90-78

b=12

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Answer 2

Question :–

a and b are complementary if a = 78 then b = ?

Solution :–

We know that,

Complementary = 90°

Therefore,

$a + b = 90 \degree$

$78 \degree + b = 90 \degree$

$b = 90 \degree - 78 \degree$

$\boxed {b = 12 \degree}$