The measures of some angles are given below. Write the measures of their complementary angles.
`40^@`

Explanation

Let the measure of the complementary angle of `40^@` be `x^@`.
Then 40 + x = 90
`therefore` 40+x-40=90-40
... (Subtracting 40 from both the sides)
`therefore` x=50.
The complementary angle of `40^@` is `50^@`.