Question 2: What does 2:am mean (mathematical explanation) is unknown.
Question 3: What is the perspective? The concept of "perspective" is very common in junior high school mathematics and physics. The so-called perspective is the perspective when observing objects.
You can look from the front, from the side, looking down, looking up and so on.
Question 4: In mathematics, what is perspective can be explained in combination with the following. In this passage, the angle of view is understood as the angle between a thing and the light reflected by it to the eyes. In fact, simply speaking, no matter which point is connected with these two points, the degree of the angle formed is 90 degrees. In the garden, the included angle of diameters is equal to 90 degrees. So these points are * * * round. You can ask again if you don't understand. Hope to adopt. Thank you.
Question 5: What is an angle? Mathematically, it is the degree of an angle. For example, the right angle is 90 degrees.
What does the question A.M. mean (mathematically)? In parabolic function, y-m represents the range of translation of the function through reference parabola y 2 = 2px, which is an axisymmetric figure. When the chord AB is symmetrical about X, it is proved that the vertex of the parabola is at the origin, that is, the parabola is a reference parabola, and there is no translation up and down. At this time, m=0.