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-   -   Magnitude of a line (https://www.askmehelpdesk.com/showthread.php?t=85650)

  • Apr 23, 2007, 10:51 PM
    EminemBaby
    Magnitude of a line
    Points A(-8,3) and B(1,-9) are the initial and that terminal points of line AB. Find the magnitude of line AB.
  • Apr 23, 2007, 11:31 PM
    Capuchin
    You know pythagoras' theorem don't you?

    Draw the points on a graph, and draw a right angled triangle with the line AB as the hypotenuse, and the other 2 sides in the x and y directions respectively.

    You can work out what both of the other sides are can't you? So you can also work out how long the hypotenuse is!

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