Suppose someone tells you that she has a triangle with sides having lengths 2.2, 4.5, and 6.7. is this a right triangle?

You can apply the Pythagorean theorem:
a^2 + b^2 = c^2
c is the longest side of the triangle
2.2^2 + 4.2^2 = 6.7^2
4.84 + 17.64 = 44.89
22.48 =/= 44.89
That is not a right triangle

It is 5.8 you add all of the up to equat 180 then solve the equation

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