Find the length of the third side of the right triangle, if one side = 4sqrt3

Find the length of the third side of the right triangle, if one side = $$\displaystyle{4}\sqrt{{3}}$$, and the hypotenuse = 8.

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Bella
Using Pythagoras theorem,
$$\displaystyle{8}^{{2}}={b}^{{2}}+{\left({4}\sqrt{{3}}\right)}^{{2}}$$
$$\displaystyle{b}^{{2}}={8}^{{2}}–{\left({4}\sqrt{{3}}\right)}^{{2}}=$$
$$\displaystyle={64}–{48}={16}$$
$$\displaystyle{b}^{{2}}={16}$$
$$\displaystyle{b}={4}$$