For the values a = 2.9 which is a leg of a right triangle, and value c = 4.2, which is the hypotenuse, find the length of the other leg, b, to the nearest tenth.
The right one is B) 3.0, as you know [tex] a^{2} + b^{2} = c^2[/tex] due to Pythagoras' theorem. So [tex]b= \sqrt{c^2 - a^2} [/tex]. Put the right numbers into the formula and you get 3.0. That is B.
