Question

See attachment. What would be the perpendicular lines of this sense there are 4 right anglrs being formed? I thought perpendicular lines had to be like like "line segment AB is perpendicular to line segment CD" or something like that. Not just one letter...

Answer 1

Yeah not just one letter but two letters perpendicular to another two letters. Each 2 letters like AB is a straight line which is crossed by another 2 letters making it perpendicular.