### Video Transcript

Given that the measure of angle
π΄ππ΅ equals 75 degrees, what is the measure of angle π΅ππΆ?

Letβs start by filling in this
angle information onto the diagram, that angle π΄ππ΅ is 75 degrees. We need to find out the measure of
angle π΅ππΆ. We can work this out once we
realize that this angle at π΄ππΆ is given as a right angle of 90 degrees. So our two angles π΄ππ΅ and π΅ππΆ
must add to give us 90 degrees. We could in fact say that these two
angles are complementary. The size of angle π΅ππΆ could be
calculated by working out 90 degrees subtract 75 degrees. And therefore, we can give our
answer that the measure of angle π΅ππΆ is 15 degrees.