Question

Can someone help, no links plz

Answer 1

`√(377)`, or approximately 19.416

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 = √(377) \approx 19.416`.

Answer 2

x=19.4

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