Question

Descriptive geometry:

- Is projecting a square in a plane not perpendicular to either pi 1 or pi 2 has its properties ?
-When to use Auxiliary planes.

Answer 1

Excellent question... You speak of things I never heard of and I'm curious for the answer and explanation.

So after a quick Google, descriptive geometry is the same as or similar to my Freshman Engineer (101) graphics class back in the "Dark Ages".

I am starting to grasp your question, but the pi 1 and pi 2 are confusing me, sorry. Apparently, I need me some more Google.

Later maybe, if I find something.

Answer 2

Sorry to have to tell you this, but the wording of your question is so unclear that I have no idea of how to help you. In what content did this question (or these questions) arise? What, specifically, are you hoping to learn? What do "pi 1" and "pi 2" signify?

Answer 3

From where did you get this homework problem? I'd suggest you go back to that source and ensure that you have copied down and typed in here every bit of the instructions and any other information presented with this problem.

Answer 4

Thanks @mathmale I'm kind of glad some body else found this confusing. :)

Answer 5

@mathmale , @retirEEd ,

It's descriptive geometry :


using the words "pi one " , "pi two" is common as it's the standard name for the projection planes.

As the plane pi-1 rotate 90 degrees

we will get

What am asking is , if I projected a triangle in a plane from a plane like this

or whatever shape will it still has it's properties.


-The second question I wanna know where exactly , should i use auxiliary planes , the one of the few reasons I know is to find the true length.


I am looking for the rest.