What is the exact distance between point e and point f

Answer 1

if e is the point (g,h) and f is the point (j,k)

then the distance ef = sqr((g-j)^2 + (h-k)^2)

It's an application of the pythagorean theorem

For example, the distance from (1,1) to (2,2)=

sqr((2-1)^2 + (2-1)^2) = sqr(1^2 +1^2) = sqr(1+1) = sqr2

It may help to plot the two points and construct a right

triangle. the distance between the 2 points= the length of the hypotenuse = square root of the sum of the squares of the base and the height

if e and f are (g,h) and (j,k) then the base of the right triangle = g-j and the height = k-h. sqaure the base, square the height. sum them, take the square root of the sum = the hypotenuse = the distance from e to f.