Question

4.
19
x
22

Explanation:

Step1: Apply Pythagorean theorem

For a right triangle, $a^2 + b^2 = c^2$, where $c$ is the hypotenuse. Here, $x^2 + 19^2 = 22^2$

Step2: Calculate squared values

$19^2 = 361$, $22^2 = 484$, so $x^2 = 484 - 361$

Step3: Solve for $x^2$

$x^2 = 123$

Step4: Find square root of 123

$x = \sqrt{123}$

Answer:

$\sqrt{123}$ (or approximately 11.09 if a decimal is needed)