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23 August, 14:08

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

acute

right

obtuse

no triangle can be formed with those sides.

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Answers (1)
  1. 23 August, 16:06
    0
    Right angle

    4.2 squared + 6.4 squared = 58.6

    Square root of 58.6 = 7.6 so you know the longest side is right

    And since you used Pythagoras theorem you know it must be a right angle
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