Mathematics

Find the value of the unknown interior angle x in the following figure.

SOLUTION
$80^o + \angle BAC = 180^o$
$\therefore \angle BAC = 100^o$
Sum of interior angles of a $\Delta le$ is $180^o$
$\Rightarrow x + 30^o + \angle BAC = 180^o$
$\therefore x = 50^o$
$OR$
Since, Exterior angle$=$Sum of interior opposite angles, therefore $30^o+x=80^o$
$\Rightarrow x=80^o-30^o=50^o$. You're just one step away

Subjective Medium Published on 09th 09, 2020
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