Question

Is a triangle with sides 2 cm, 7 cm and 8 cm rectangular?
how do u know? which calculates did u make? Please help!!

Answer 1

By rectangular, do you mean a right triangle?

Answer 2

If so, we know that the longest side of a right triangle is the hypotenuse. We can use Pythagorean Theorem to verify if the side actually has side length 8. c = \[\sqrt{a^2 + b^2}\]

Answer 3

oh no!!! i translated from swedish to english u are right! thank u!!!