Question

If figure, $AB\parallel CD$. Determine $\angle a$

• A. ${53}^o$
• B. ${73}^o$
• C. ${83}^o$
• D. ${93}^o$

Answer 1

The correct option is D ${93}^o$

ABCD, Draw a line l parallel to AB.
From figure $\angle 1={55}^{o}and\angle 2={38}^o$
$\angle a=\angle 1+\angle 2$
$\angle a={55}^o+{38}^o={93}^o$