Question

What is an expression for the distance between the origin and a point P (x,y) ?

Answer 1

D = √ (x² + y²)

Explanation:

see attached pic for reference:

in our case we are told that the points are

(0,0) and P(x,y)

substituting these into the given equation

distance D, = √ [ (x - 0)² + (y-0)²

D = √ (x² + y²)