The three angles of a quadrilateral are respectively equal to `100^0,\ 98^0a n d\ 92^0dot` Find its fourth angle.

Explanation

Given:
Angles of quadrilateral are:`100^@, 98^@` and `92^@`
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^@`.
`therefore100^@\+98^@\+92^@\+x^@=360^@`
`x^@\+290^@=360^@`
`x^@=360^@-290^@`
`x^@=70^@`
Hence, the value of the fourth angle is `70^@`.