Lewis structure and Shape Question

[Kiara1F]

I have a question regarding the Lewis structure - homework problem 4(25)

Write Lewis structure and determine if its polar or nonpolar
CH2Cl2

why is it that the solutions has it written with C as central atom and Cl at the bottom and the other Cl to the left of it with the H to the right and the other H at the top? Why isnt one H at the top and one at the bottom and the Cls on the right and left side? If they were positioned as the latter wouldn't the dipoles cancel?

[Cliff Danza 3F]

The molecule will have a tetrahedral geometry when considered in 3D, and no matter where you place the two Cl- the dipole moments will not cancel.