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 \(a^{2} + b^{2} = c^2\) due to Pythagoras' theorem. So \(b= \sqrt{c^2 - a^2}\). Put the right numbers into the formula and you get 3.0. That is B.
