Plane HKP and plane RKP are two distinct planes. Name the intersection of plane HKP and plane RKP.
3 answers
The intersection of plane HKP and plane RKP is a line.
They wanted you to name the line, not just mention that it is a line. In fact, it is the line KP
Apologies for the misunderstanding. The intersection of plane HKP and plane RKP is named line KP.