Video Transcript
Work out the value of 𝑥 in the
figure.
First of all, let’s think about
what we can say about these lines. We have two parallel lines cut by a
transversal, and here are the two angles we’re considering. They’re on the same side of the
transversal and they’re in the same position at either intersection, which means we
call them corresponding angles. And when two parallel lines are cut
by a transversal, corresponding angles are congruent, and therefore 𝑥 must be equal
to 72.
