Question

Find the value of $a$?

Answer 1

In this given figure.

$\begin{array}{c}a+{23}^0+a={180}^0\\ 2a={180}^0-{23}^0\\ 2a={157}^0\\ a=\frac{157}{2}\end{array}$

$=78.5$

Hence,

We get $a=78.5$