If sum of three angles of a quadrilateral is \[280{}^\circ \], find the measure of the fourth angle.

If sum of three angles of a quadrilateral is \[280{}^\circ \], find th

1.	If sum of three angles of a quadrilateral is \[280{}^\circ \], find the measure of the fourth angle.
A.	\[90{}^\circ \]
B.	\[80{}^\circ \]
C.	\[120{}^\circ \]
D.	\[100{}^\circ \]
E.	None of these
Answer» C. \[120{}^\circ \]