Length of a line from (50, 300) to (0, 90)

Question

It's on a coordinate plane and those are the coordinates

Answer 1

First we take the differences between the coords:

x: 50, y: 300-90=210.

Square these: 2500, 44100 and add the squares: 46600.

The length of the line joining the coords is the square root of this: √46600=215.87 approx. (Pythagoras’ Theorem).