If i have a point outside of a plane wouldnt it be coplanar to since planes extend forever?

Question

LIke lets say I have plane Z, and points A,B, and C make plane Z. And then i have a point lets say D outside of plane Z. Wouldn't it be coplanar to all the points in the plane? Because they say that planes extend forever.

Answer 1

But they only extend in one dimension.

Think of it like a sheet of paper or the table top....

You put three dots on the paper...is point D on the paper ??? Of course not.

Put three coins on the table....

is the 4th coin in your hand or in your pocket on the table top... NO!!!