Question

Find $x$ in the following figures.

Answer 1

We know that the sum of all exterior angles of any polygon is $360\degree$.
(a) $125\degree + 125\degree + x = 360\degree$
$250\degree + x = 360\degree$
$x = 110\degree$

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(b)

$60\degree + 90\degree + 70\degree + x + 90\degree = 360\degree$
$310\degree + x = 360\degree$
$x$ = $50\degree$