Use the Formula To Find the Area of the Triangle with the Given

Multiple Choice

Use the formula $$\text { Area } = \pm \frac { 1 } { 2 } \left| \begin{array} { l l l } x _ { 1 } & y _ { 1 } & 1 \\x _ { 2 } & y _ { 2 } & 1 \\x _ { 3 } & y _ { 3 } & 1\end{array} \right|$$ to find the area of the triangle with the given vertices. Choose the
+ or - sign so that the value of the area is positive.
- $$( 5,4 ) , ( - 5,1 ) , ( - 2 , - 2 )$$

A) 39
B) $\frac { 39 } { 2 }$
C) $- \frac { 39 } { 2 }$
D) $- 39$