Question

Triangle DEF is on a coordinate plane with its

Answer 1

Answer:

$21\ \text{square units}$

Step-by-step explanation:

The points are $D(-3,5), E(-3,-2)$ and $F(3,0)$.

Area of a triangle is given by

$A=\dfrac{D_x(E_y-F_y)+E_x(F_y-D_y)+F_x(D_y-E_y)}{2}$

$\Rightarrow A=\dfrac{-3(-2-0)+-3(0-5)+3(5-(-2))}{2}$

$\Rightarrow A=21\ \text{square units}$

The area of the given triangle is $21\ \text{square units}$.