Imagine you have been called as a expert witness in a court case. your expertise is in the area of planes (not airplanes, just planes in geometry). your task is to convince the jury that there is, in fact, a plane based on the given information. you must prove all three of the definitions of a plane given in lesson 1. you may need to include some other definitions such as the definition of an angle, a ray, etc. question from the lawyer: "dr. expert, i only see a 70° angle here. kelly said that having this angle means you have a plane. i enter exhibit a which shows three definitions of a plane. from what i see, none of these definitions say that an angle defines a plane. explain how each definition proves that an angle defines a plane." state the definition and then explain how you can prove each definition given the angle.