If the distance between B and C is 0, B and C are the same points. If that is the case, the distances between A and B and A and C must be the same.
However, i β 1.
If you want it to be real (hehe) the triangle should be like this:
C
| \
|i| | \ 0
| \
A---B
|1|
Drawing that on mobile was a pain.
As the other guy said, you cannot have imaginary distances.
Also, you can only use Pythagoras with triangles that have a 90Β° angle. Nothing in the meme says that there's a 90Β° angle. As I see it, there are only 0Β° and 180Β° angles.
This is clearly meant to be a right triangle. And the distances between the points are the same (because the squares of the coordinate differences are the same), just the directions are different.
If you move 1 unit forward, turn the correct 90 degrees, and then move i units forward, you will end up back where you started.
You can't have a distance in a "different direction". That's what the |x| is for, which is the modulus. If you rotate a triangle, the length of the sides don't change.
The vector from one point to another in space has both a distance (magnitude) and a direction. Labeling the side with i only really makes sense if you say we're looking at a vector of "i units that way", and not at an assertion that these two points are a directionless i units apart. Then you'd have to break out the complex norms somebody mentioned.
Isnt it fine to assume a 90Β° angle its just that when u square side AC ur multiplying by i which also represents a rotation by 90Β° so u now nolonger have a triangle?