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7th grade math Pygorean Theroem Ms.Sue please

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Explain if a triangle with the given lengths is a right triangle.

1. 18, 24, 30
2. 7, 24, 25
3. 13, 14, 15

I really do not know how to solve these problems! I have no idea how!!!! Please help!

  • 7th grade math Pygorean Theroem Ms.Sue please -

    a^2 + b^2 = c^2

    1.
    18^2 + 24^2 = C^2
    324 + 576 = c^2
    900 = c^2
    30 = c

    The first one is a right triangle.

    Do the same thing with the other two problems.

  • 7th grade math Pygorean Theroem Ms.Sue please -

    ok thanks but how do you know if "30"
    is a right triangle? I thought 90 was a right triangle?

  • 7th grade math Pygorean Theroem Ms.Sue please -

    Ahh -- 30 is the length of the hypotenuse (longest side).

    http://www.mathsisfun.com/pythagoras.html

  • 7th grade math Pygorean Theroem Ms.Sue please -

    thanks

  • 7th grade math Pygorean Theroem Ms.Sue please -

    You're welcome.

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