One angle of a quadrilateral is `180^0` and the remaining three angles are equal. Find the three equal angles.

Explanation

Let us consider the other angles be `x`.
As we know that the sum of all angles of a quadrilateral `=360^@`
`=>180^@+x+x+x=360^@`
`=>180^@+3x=360^@`
`=>3x=360^@-180^@`
`=>x=(360^@-180^@)/3`
`=>x=60^@`