File talk:Cartesian with grid.svg

The $z$ coordinate of the indicated point $\left(x,y,z\right)$ is wrong. The real value is upper in the $z$ axis. As a matter of fact, in order to find the $z$ coordinate, you must intersect the $z$ axis with a line, which is parallel to the line that goes from the origin to the point $\left(x,y\right)$ on the $xy$ plane and passes through the point $\left(x,y,z\right)$. — 以上未签名的留言是由该用户加入的： Giuseppe Basile 99 (留言 • 贡献) 18:28, 14 May 2021 (UTC)