A and B Represent the Two Legs of a Right $\mathrm { a } = 12 \mathrm {~km} , \mathrm { c } = 20 \mathrm {~km}$

Multiple Choice

a and b represent the two legs of a right triangle, while c represents the hypotenuse. Find the length of the unknown side.
- $\mathrm { a } = 12 \mathrm {~km} , \mathrm { c } = 20 \mathrm {~km}$

A) $b = 14 \mathrm {~km}$
B) $b = 19 \mathrm {~km}$
C) $b = 16 \mathrm {~km}$
D) $b = 20 \mathrm {~km}$