1. If all the draws are settled, you will get 14 points, which is 5 points less. The easiest way to change them is to turn three draws into victory and one draw into negative. After that, every time you change a game to win, you have to change two games to lose, and you must change three games at the same time. So it should be (14-4)/3+65433.

2. The length is 2. BC: (open 2)/2.

Distance 2 = AB 2-( 1/2bc) 2

Therefore, the root of the distance ={ 1-[ (root 2)/4] 2} =(7/8).

3.AB^2+AC^2=BC^2 ( 1)

Distance from b to surface a L 1=AB*sin30 degrees (2)

C...L2 = AC * sine 45 degrees (3)

If we want to discuss the distance from BC to plane A, BC is parallel to plane A..

L 1=L2= distance (4)

Substitute (2), (3) and (4) into (1) to get the solution.

Square root of distance =6

("Plane B" should be changed to "Plane A")

I am a student in the Physics Department of Xiamen University.

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