Question

Find $x$, as shown in the figure.


[2 marks]

Answer 1

By exterior angle property, an exterior angle of a triangle is equal to the sum of its opposite interior angles.
[1 mark]

$\Rightarrow {110}^{\circ }={50}^{\circ }+x$
$\Rightarrow x={110}^{\circ }-{50}^{\circ }$
$\Rightarrow x={60}^{\circ }$
[1 mark]