Question

Can someone help, no links plz

Answer 1

Answer:

$\sqrt{377}$, or approximately 19.416

Step-by-step explanation:

This is a right triangle, so we can use the Pythagorean Theorem, which gives us that $x^2 + 8^2 = 21^2$. It follows that $x^2 = 377$, so $x = \sqrt{377} \approx 19.416$.

Answer 2

Answer:

x=19.4

Step-by-step explanation:

a^2+b^2=c^2

x^2+8^2=21^2

x^2+64=441

x^2=377

square root of 377 is 19.41648784

rounded would be 19.4