Answer:
Step-by-step explanation:
I'm going to start with #2, since your drawing makes the explanation a bit difficult otherwise. Line the that intersects the 2 planes is names by the 2 points that are on the line. Just for clarification, the line is the long extension with the 2 arrows, 1 at each end. The 2 points that lie on that line are the intersection of the 2 planes. So #2 is line XZ which is choice D. Now onto #1.
The points to the left of that line are the points on plane M and the points to the right of the line are the points on plane N. #1 asks us to name the points on plane M, which are X, Y, and Z; choice C.
For #3, we have to know what each of those postulates is. Upon investigation of the actual definition, the one that we want is A that says "If 2 points are contained in a plane, then the line through them is contained in the same plane."
