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24 January, 13:52

Classify the triangle based on the side lengths 4.2, 6.4 and 7.6.

right

acute

obtuse

no triangle can be formed with given side lengths

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Answers (1)
  1. 24 January, 14:00
    0
    The triangle is acute.

    Step-by-step explanation:

    Basically, you need to use Pythagoras Theorem.

    This is what you need to know then

    In ABC with longest side c:


    c²=a²+b² then the triangle is right.

    c²>a²+b² then the triangle is obtuse.

    So let's go Pythagoras Theorem for your triangle.

    4.2²=17.64

    6.4²=40.96

    7.6²=57.76

    57.76<17.64+40.96

    So the triangle is acute
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