Need math help with the legth of some triangles in cm

label Mathematics
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Dec 2nd, 2015

Thank you for the opportunity to help you with your question!

If c%5E2+=+a%5E2+%2B+b%5E2 it's a right triangle.
If c%5E2+%3E+a%5E2+%2B+b%5E2 it's an obtuse triangle.
If c%5E2+%3C+a%5E2+%2B+b%5E2 it's an acute triangle.

c-largest length

10^2=100

8^2=64

5^2=25

64+25=89

so 89<100

then

c%5E2+%3E+a%5E2+%2B+b%5E2

 so it's an obtuse triangle

Please let me know if you need any clarification. I'm always happy to answer your questions.
Dec 2nd, 2015

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