1.

In the given figure, x + y =A) 100° B) 160° C) 260° D) 120°

Answer»

Correct option is (C) 260°

\(80^\circ,180^\circ-x\;\&\;180^\circ-y\) are angles of a triangle.

\(\therefore80^\circ+180^\circ-x+180^\circ-y=180^\circ\)

\(\Rightarrow\) \(x+y\) \(=80^\circ+180^\circ=260^\circ\)

Correct option is  C) 260°



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