A quadrilateral has three acute angles each measures `80^0dot` What is the measure of the fourth angle?

Explanation

Given:
A quadrilateral has three acute angles each measures `80^@`.
Let the fourth angle be `x^@`.
By angle sum property of quadrilateral, we state that the sum of all four angles of the quadrilateral is equal to `360^@`.
`therefore80^@\+80^@\+80^@\+x^@=360^@`
`x^@\+240^@=360^@`
`x^@=360^@-240^@`
`x^@=120^@`
Hence, the value of the fourth angle is `120^@`.