Question

Help me pls I will give brainliest if it is correct. ​

Answer 1

Answer:

$\sqrt{377}$

Step-by-step explanation:

this is a right angle triangle so you're going to use Pythagoras formula

$21 {}^{2} = x {}^{2} + 8 {}^{2}$

$x {}^{2} = 21 {}^{2} - {8}^{2}$

$x {}^{2} = 377$

$x = \sqrt{377}$

hope it helps :)