Question

If ∠A = 36°27'46" and ∠B = 28°43'39", find ∠A + ∠B.

Answer 1

$\angle A+\angle B=\left[\left(36°27\text{'}46\text{'}\text{'}\right)+\left(28°43\text{'}39\text{'}\text{'}\right)\right]$
We know that $$\begin{gathered} 1°=60\min \mathrm{or}60\text{'} \\ 1\text{'}=60\sec \mathrm{or}60\text{'}\text{'} \end{gathered}$$

Deg	Min	Sec
36	27	46
+28	43	39
65	11	25

Hence, the measure of the required angle = $65°11\text{'}25\text{'}\text{'}$