Question 4
As shown in the diagram below, $ABCD$ is a quadrilateral with $AB=BC$, $\angle ABD=55^\circ$, $\angle CBD=75^\circ$ and $\angle ADC=115^\circ$.

What is the positive difference (subtract the smaller angle from the larger angle), in degrees, of $\angle BAD$ and $\angle BCD$?

What is the positive difference (subtract the smaller angle from the larger angle), in degrees, of $\angle BAD$ and $\angle BCD$?