Math
posted by Jane .
What is the length of a segment whose endpoints are (5, 8) and (9,2). Please explain to me what the formula or rules for working this problem.

think of the line segment as the hypotenuse of a right triangle. Then the legs have length (95)=4 and (2(8))=10.
So the length of the line segment is sqrt(4^2 + 10^2) = 10.77