Question

what is the missing side length? input the length. then click done. a = 225 a = 144 12 x 9 a = 81 x =? done

Explanation:

Step1: Confirm right triangle sides

The legs of the right triangle are 9 and 12.

Step2: Apply Pythagorean theorem

$$x = \sqrt{9^2 + 12^2}$$

Step3: Calculate squared terms

$$9^2 = 81, \quad 12^2 = 144$$

Step4: Sum and take square root

$$x = \sqrt{81 + 144} = \sqrt{225} = 15$$

Answer:

15