Answer
Area of $\triangle$ RSV = 20.4$cm^{2}$
Work Step by Step
we need to find $A_{RSV}$
Given $A_{RST}$ = 40.8 $cm^{2}$
Area of $\triangle$ RST = Area of $\triangle$ RSV + Area of $\triangle$ RVT
Given theorem, “A median of a triangle separates it into two triangles of equal area.”
Therefore $A_{RSV}$ = $A_{RVT}$
Area of $\triangle$ RST = Area of $\triangle$ RSV + Area of $\triangle$ RSV
40.8 = 2 Area of $\triangle$ RSV
Area of $\triangle$ RSV = $\frac{40.8}{2}$ = 20.4$cm^{2}$
