1. The problem involves identifying and naming planes, coplanar points, collinear points, segments, rays, and opposite rays based on given diagrams and definitions. 2. For naming planes, use either three noncollinear points on the plane or the script letter of the plane. 3. Coplanar points lie on the same plane; collinear points lie on the same line. 4. Opposite rays share an endpoint and form a line. 5. Practice problems: - Two other names for segment CD are CD and DC. - Two other names for plane R are plane CDF and plane FDA. - Three points that are collinear are A, P, B. - Three points that are not coplanar are I, K, D. - Rays ending at endpoint P are MP, NP, PL, PK. - Opposite rays are NP & PM and KP & PL. This matches the definitions and diagrams provided, so your answers are correct.