Answer:
c. Square root of 12 units
Step-by-step explanation:
We have to use the Pythagorean Theorem to figure this out:
[tex]\displaystyle a^2 + b^2 = c^2 \\ \\ -2^2 + 4^2 = a^2 \\ \\ -4 + 16 = a^2 \\ \\ \sqrt{12} = \sqrt{a^2} \\ \\ 2\sqrt{3} = a[/tex]
* Since we are defining the second leg, we write the formula in reverse using subtraction.
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