Question

find the measure of angles marked ‘?' in each of the following
question number 5 b​

Answer 1

Step-by-step explanation:

Answer 5(b):-

$\[ \begin{array}{l} \rm \angle C A B+\angle A C B+\angle C B A=180^{\circ} \\ \\ \rm\Rightarrow 2 x+4 x+3 x=180^{\circ} \\ \\ \rm \Rightarrow x=\dfrac{180^{\circ}}{9}=20^{\circ} \\ \\ \rm\angle D A C+\angle C A B=180^{\circ} \\ \\ \rm\Rightarrow \angle D A C+2 x=180^{\circ} \\ \\ \rm \Rightarrow \angle D A C=180^{\circ}-40^{\circ}=140^{\circ} \\ \\ \boxed{\color{green} \rm\Rightarrow \angle D A C=140 \degree} \end{array} \]$

Hence the answer is 140°.

Answer 2

$\scriptsize\colorbox{lightyellow} {\text{ \bf♕ Brainliest answer }}$

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Answer 5(b):-

$\begin{gathered} \begin{array}{l} \rm \angle C A B+\angle A C B+\angle C B A=180^{\circ} \\ \\ \rm\Rightarrow 2 x+4 x+3 x=180^{\circ} \\ \\ \rm \Rightarrow x=\dfrac{180^{\circ}}{9}=20^{\circ} \\ \\ \rm\angle D A C+\angle C A B=180^{\circ} \\ \\ \rm\Rightarrow \angle D A C+2 x=180^{\circ} \\ \\ \rm \Rightarrow \angle D A C=180^{\circ}-40^{\circ}=140^{\circ} \\ \\ \boxed{\color{green} \rm\Rightarrow \angle D A C=140 \degree} \end{array} \end{gathered}$

Hence the answer is 140°.