To get the distance between ANY two points on a number line:
* Subtract one number from the other
* Take the absolute value of the result
In symbols:
distance(a, b) = | a - b |
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It is simply the difference between their y coordinates.
You replace variables by their assigned values, then do the calculations.
It is the longest distance between two opposite corners of the square and it is possible to use Pythagoras' theorem to find the length of the diagonal
Radius * 2 * pi (you might aswell use the computer's calculator in scientific mode)
Use Pythagoras' Theorem: calculate the square root of ((difference of x-coordinates)2 + (difference of y-coordinates)2).