Use a Determinant and the Given Vertices of a Triangle $\frac { 41 } { 2 }$

Multiple Choice

Use a determinant and the given vertices of a triangle to find the area of the triangle.? ? ?

A) $\frac { 41 } { 2 }$
B) 21
C) $\frac { 39 } { 2 }$
D) 20
E) $\frac { 43 } { 2 }$