Question 9
In the diagram below, $ABCD$ is a parallelogram of area 60 cm² and $X_j$ are points on the sides such that
$$\begin{aligned}AX_1&=X_1X_2=X_2X_3=X_3X_4=X_4D=DX_5=X_5X_6=X_6C\\&=CX_7=X_7X_8=X_8X_9=X_9X_{10}=X_{10}B=BX_{11}=X_{11}X_{12}=X_{12}A.\end{aligned}$$
What is the area, in cm², of triangle $X_4X_8X_{12}$?
$$\begin{aligned}AX_1&=X_1X_2=X_2X_3=X_3X_4=X_4D=DX_5=X_5X_6=X_6C\\&=CX_7=X_7X_8=X_8X_9=X_9X_{10}=X_{10}B=BX_{11}=X_{11}X_{12}=X_{12}A.\end{aligned}$$
What is the area, in cm², of triangle $X_4X_8X_{12}$?