Question

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

Explanation:

Step1: Apply Pythagorean theorem

$$c=\sqrt{a^{2}+b^{2}}$$
Here \(a = 9\), \(b=12\).

Step2: Substitute values

$$c=\sqrt{9^{2}+12^{2}}=\sqrt{81 + 144}=\sqrt{225}$$

Step3: Calculate the square root

\(\sqrt{225}=15\)

Answer:

\(15\)