Derive Perimeter of Rectangle

Discussion in 'Other Pre-University Math' started by nycmathguy, Jul 7, 2022.

  1. nycmathguy

    nycmathguy

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    Derive the formula P = 2(length) + 2(width).
     
    nycmathguy, Jul 7, 2022
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  2. nycmathguy

    MathLover1

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    upload_2022-7-6_21-57-16.jpeg

    Since the perimeter is equal to the sum of all the sides of the polygon. Hence, in the case of a rectangle, the perimeter (P) is;
    P = sum of all its four sides
    P = a + b + a + b (Opposite sides of rectangle are equal)
    P = 2(a + b)
    Hence, derived
     
    MathLover1, Jul 7, 2022
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    nycmathguy likes this.
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  3. nycmathguy

    nycmathguy

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    Thanks. Another nice picture. Easy explanation.
     
    nycmathguy, Jul 7, 2022
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