Question

In a given figure PQ || ST, $\angle PQR={110}^o,\angle RST={130}^o$, then value of $\angle QRS$ is -

• A. ${20}^o$
• B. ${50}^o$
• C. ${60}^o$
• D. ${70}^o$

Answer 1

The correct option is C ${60}^o$

In the given figure,

By Exterior angle property,

$\angle QRS+{50}^0+{180}^0-{110}^0={180}^0$

$\angle QRS-{60}^0=0$

$\angle QRS={60}^0$

Hence, this is the answer.