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18 November, 22:30

7. A triangle has sides with lengths of 10 metres,

16 metres and 20 metres. Is it a right angled

triangle? Explain your reasoning.

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Answers (1)
  1. 19 November, 00:27
    0
    It is not a right triangle.

    Step-by-step explanation:

    We can prove this by Pythagorean theorem because it represents to a right triangle.

    Pythagorean theorem:

    a² + b² = c²

    Now substitute the values.

    Note: the longest side will represent c

    So,

    a = 10 m

    b = 16 m

    c = 20 m

    10² + 16² = 20²

    The objective here is to make them equal.

    100 + 256 = 400

    356 ≠ 400

    They are not equal so it is not considered a right triangle.
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