There are many ways to do this, I prefer the distance formula it looks like this:
\(\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\)
We are given 2 pairs of coordinates: (0,2) and (0,4)
0=x1
2=y1
0=x2
4=y2
We take the numbers and sub in the values above in place of the variables:
\(\sqrt{(0-0)^2+(4-2)^2}\)
Simplfy it:
\(\sqrt{(0)^2+(2)^2}\)
0^2=0
2^2=4
We are left with :
\(\sqrt{4}\)
\(\sqrt{4} =2\)
Final answer: 2
