Hello,

I have Tetrahedron and I know all it's points I need to compute it's volume.

I have computed the square of the triangle and all I need is the hight.

Please give me an answer including vectors.

Thanks a lot.

Hello,

I have a plane x+2*y+3*z = 0 and a point A(1,2,3).

From A there are 3 lines :

P := (1, 2, 3) P1 := (-1, -1, 0) L1 := P+t*(P1-P)

How to find the cutting points between L1 and the above plane?

How to find a cutting points between planes? 2 3 4 planes etc.

It is urgent, please help me!

Hello everyone,

Please help me with this:

I have a given matrix (with numbers size nxn), within this matrix there is also some parameters. I am asked to find all the b vectors that solves this equation. Important: Firstly, I was asked to find the parameters that gives us Determinant(A)=0.

I have a difficulty with 2 parameters or more, and how I suppose to solve this if x and b are (x1,x2,x3)', (b1,b2,b3)' i.e not given.

Hello everyone,

I want to create a loop in descending order like this: for i from 100 by -0.01 to 0 do ....

I wrote functions trying this logical solution but nothing, please help, it's very important to me to get the answer as soon as possible.

Thanks in advance!

Steve