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Question
In a ΔABC, if ∠A = 55°, ∠B = 40°, find ∠C.
Solution
Given `∠ A=55^@,∠ B=40^@` then ∠ C=?
We know that
In a ABC sum of all angles of triangle is 180°
i.e, ∠ A+∠ B +∠ C =`180^@`
⇒`55^@+40^@` ∠ C `=180^@`
⇒`95^@+∠ C=180^@`
⇒`∠ C=180^@-95^@`
⇒`∠C=85^@`
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