Question

What is the distance between `(–5, –9)` and # (–4, 7) #?

Answer 1

`sqrt(257)`

Explanation:

You first form the vector between those points : `(-4 -(-5),7 - (-9)) = (1,16)`. You then calculate its norm by the formula `sqrt(x^2 + y^2)`

`sqrt(1 + 16^2) = sqrt(257)`