notes/Resources/mathematics/geometry/euclidean.md

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# Create a orthogonal Vector
For this we can use the dotproduct.
Example:
$V_1 = [1,6,2]$
$V_2 = ?$
We know that the dot product of these two vectors must be zero, we can use that
$V_1 \cdot V_2 = 0$
Let's plug in our numbers
$1 * V_2x + 6 * V_2y + 2 *V_2z = 0$
Lets choose arbitrary numbers for $V_2x$ and $V_2y$, for now $1$ because that makes the calculation a bit easier
$1*1+6*1+2*V_2z = 0$
$7+2V_2z = 0$
$V_2z = -3.5$
```ts
// Note the the resulting vector can be very large
function findOrthogonalVector([x,y,z]:number[]){
return [1,1,-((x+y)/z)]
}
```