Question

In the given figure, if $l\parallel m$, the value of $x$ is

• A. ${200}^o$
• B. ${285}^o$
• C. ${75}^o$
• D. none

Answer 1

The correct option is C ${75}^o$

In figure, l || m

$\Rightarrow \angle O={360}^o-({145}^o+{140}^o)$

$\Rightarrow \angle O={360}^o-{285}^o$

$\Rightarrow \angle O={75}^o$

$\therefore x={75}^o$

$\therefore$ opting B is incorrect.