Question

I need help on both question .plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz help​

Answer 1

#b

See AB||CD

Hence

$\\ \rm\Rrightarrow$

$\\ \rm\Rrightarrow 90=90$

$\\ \rm\Rrightarrow \dfrac{1}{2}$

$\\ \rm\Rrightarrow$

Now using angle sum property

$\\ \rm\Rrightarrow a+45+45=180$

$\\ \rm\Rrightarrow a=180-90$

$\\ \rm\Rrightarrow a=90$