Given $a = 5 , b = 9$ , And $c = 12$

Multiple Choice

Given $a = 5 , b = 9$ , and $c = 12$ , use Heron's Area Formula to find the area of triangle $A B C$ . Round answer to two decimal places.

A) $20.40 \mathrm { sq }$ . units
B) $16.97$ sq. units
C) $19.60$ sq. units
D) $12.65$ sq. units
E) $17.40$ sq. units