Question

Find the exact length of the third side.

Answer 1

Step-by-step explanation:

Hello there!

Use the Pythagoream theorem:

$a^{2} +b^{2} =c^{2} \\4^2+2^2=c^2\\16+4=20\\x=\sqrt{20} \\x=4.472135$

:)

Answer 2

Answer:

4.47

Step-by-step explanation:

Using Pythagorean's theorem, we know that $a^{2}$ + $b^{2}$ = $c^{2}$.

$c^{2}$ is the hypotenuse which is what we are trying to figure out.

$a^{2}$ and $b^{2}$ are the measurements of the legs.

$4^{2}$+ $2^{2}$ = $c^{2}$

$4^{2}$= 16

$2^{2}$=4

16 + 4 = 20

20 = $c^{2}$

$\sqrt{20}$ = $\sqrt{c^{2} }$

2$\sqrt{5}$ = 4.47

Answer: 4.47