1.

In the given figure, y = A) 60° B) 80° C) 140°D) 70°

Answer»

Correct option is (D) 70°

y is exterior angle whose opposite interior angles in \(\triangle ABC\) are \(30^\circ\;and\;40^\circ.\)

\(\therefore y=30^\circ+40^\circ=70^\circ\)

Correct option is  D) 70°



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