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Finding diagonal of inscribed rectangle

  1. Jul 18, 2013 #1
    1. The problem statement, all variables and given/known data
    A quadrant contains an inscribed rectangle ABCD. Given the distance marked: CD=3m , what is length of AD?

    [Broken]


    2. Relevant equations

    Area of circle = pi*r^2
    Pythagorean 's theorem : a^2=b^2+c^2

    3. The attempt at a solution

    We can draw diagonal from C to B similar to that from A to D. And that diagonal is equal to radius which is 10. Correct?
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Jul 18, 2013 #2

    verty

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    Homework Helper

    Correct. Do you know the reason it is correct? I mean, what is the reason that CB = AD?
     
  4. Jul 18, 2013 #3
    be cause it is a rule for all rectangles?
     
  5. Jul 18, 2013 #4

    verty

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    Homework Helper

    Yes indeed. The diagonals of a rectangle are equal. A rhombus and parallelogram do not have equal diagonals, this is special to a rectangle.
     
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