Is it possible to construct a ∆ABC in which ∠A = 60°, ∠B = 70° and ∠C = 60°?
(a) Yes
(b) No

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Solution

(b) No
It is because, the sum of the angles of a triangle cannot be greater than 180°.
Here, the sum of $∠ A, ∠ B and ∠ C$ is 190°, which is greater than 180°.

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