Question

find the length of the third side. if necessary, round to the nearest tenth.
12
9

Explanation:

Step1: Identify triangle type

It's a right triangle, so use Pythagorean theorem: \(a^2 + b^2 = c^2\), where \(a = 12\), \(b = 9\), \(c\) is hypotenuse.

Step2: Substitute values

\(c^2 = 12^2 + 9^2 = 144 + 81 = 225\)

Step3: Solve for \(c\)

\(c = \sqrt{225} = 15\)

Answer:

15