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11 January, 16:26

If the length and breadth of a rectangle are 10cm and 20cm respectively, find the length of its diagonal

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Answers (2)
  1. 11 January, 16:39
    0
    L = 10

    B = 20

    so to find the diagonal you have to use Pythagorean theorem that is a^2 + b^2 = c^2

    10^2 + 20^2 = X^2

    X = root of 10^2 + 20^2

    X = root of 100 + 400

    X = root of 500

    X = appox 22.36
  2. 11 January, 16:48
    0
    Answer:22.4 cm

    Step-by-step explanation:

    First draw the rectangle and divide it into two triangles.

    Take one triangle out and with the length and breath solve for the hypotenuse using Pythagoras theorem

    .: H^2 = 10^2 + 20^2

    H^2 = 500

    Find the square root of both sides of the equation

    H = 22.4 cm = the length of the diagonal
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