Three angles of a quadrilateral are equal. Fourth angle is of measure `150^@` What is the measure of equal angles.

Explanation

Given:
Three angles of a quadrilateral are equal.
The fourth angle is of measure `150^@`
Let the other three angles be `x^@` each.
By angle sum property of triangle, we can say that the sum of four angles of a quadrilateral is equal to `360^@`.
`150^@\+x^@\+x^@\+x^@=360^@`
`3x^@=360^@-150^@`
`x^@=210^@/3`
`x^@=70^@`
Hence, the other three angles of the quadrilateral measures `70^@` each.