Three straight lines cross at a point.
The size of the angle [tex]c[/tex] is [tex]50[/tex]°.
If a straight line split angle [tex]c[/tex] exactly in half, it would meet line [tex]XY[/tex] at a right angle.
a) Work out the size of angle [tex]d[/tex].
b) Describe any angle facts that you use in your working.
