Question

Mark (✓) against the correct answer
In a ∆ABC, If ∠B = 40° and ∠C = 35°, then ∠A = ?

(a) 50°
(b) 55°
(c) 105°
(d) 150°

Answer 1

$$\begin{gathered} \left(c\right)105° \\ \begin{array}{l}\angle \text{A+}\angle \text{B+}\angle {\text{C=180}}^0\\ \text{=>}\angle \text{A}={\text{180}}^0-({40}^0+{35}^0)\\ \text{=>}\angle \text{A}={\text{105}}^0\\ \end{array} \end{gathered}$$