I want to draw a triangle (with the package TikZ). I don't know how to draw the line, which links the `BC`

points. I know I have to use these commands: `+(a,b)`

, `++(a,b)`

, `(a:b|-c,d)`

. Unfortunately I cannot use any of these commands, so please explain, how to use these commands and what do they mean.

*Please, introduce the commands in detail.* And also, I need the line, which links the points `AB`

. I *do not* need the points and the "`=45°`

" in my LaTeX document.

## Best Answer

I probably do not know

`tikz`

more than you (being a MetaPost user), but out of curiosity I've just consulted the quite elegant tutorial at the beginning its documentation (p. 28-93), and I've come to this result:This tutorial has probably the answers to most of your questions: a must-read.