Answer:
Step-by-step explanation:
Think of a plane like a sheet of paper. The plane they are thinking of is the plane that runs diagonally going through points UNOT
But for plane notation you only need 3 points to describe a plane. So pick any of those 3 letters because they all line on that plane.
Answers:
Plane UNO
Plane UNT
Plane NOT
There are more variations but those are some of the acceptable answers.
