Elementary Graphing Exercise 1 - Distance Formula
Verify that the distance D id given by the formula is as stated
below by applying the Pythagorean Theorem to the triangle formed by
the points (x1, y1) and (x2, y2)
as shown below.
y1) and (x2,
y2) are two given points. The lengths of the legs of
the right triangle show above are (x2-x1)
and (y2-y1). The hypotenuse has length D.