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9 December, 09:01

The perimeter of a triangle is 90 centimeters. If two sides are equally long and the third side is 9 centimeters longer than the others, find the lengths of the three sides.

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Answers (2)
  1. 9 December, 12:02
    0
    All three sides are 27 cm, 27 cm and 36 cm

    Step-by-step explanation:

    Let the sides of that triangle are x, x, y cm.

    Now as per statement of the question two sides are equal and third side is 9 centimeters longer than the others.

    So y = x + 9

    Now perimeter of the triangle is 90 cm

    so x + x + y = 90

    Now we replace the value of y from the equation given above

    x + x + (x + 9) = 90

    3x + 9 = 90

    3x = 90 - 9

    3x = 81

    x = 27 cm

    Therefore, all three sides of the triangle are 27 cm, 27 cm, 36 cm
  2. 9 December, 13:00
    0
    sides are 27 cm, 27 cm, 36 cm

    Step-by-step explanation:

    perimeter of triangle = 90 cm

    let the unknown side be x

    2x + x + 9 = 90 cm

    3x = 81

    x = 27 cm

    two sides are 27 cm each.

    and third side is 36 cm.

    sides are 27 cm, 27 cm, 36 cm
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