The dihedral angle in staggered form of newman projection of 1,1,1-Trichloro ethane is__ degree

Newman projection shows how atoms/groups are arranged around a C–C single bond.

In staggered form, the atoms/groups on the front carbon and back carbon are as far apart as possible.

This means the dihedral angle between any two adjacent groups (on front and back) is 60°.

This is true for any staggered conformation not just 1,1,1-trichloroethane.

1,1,1-Trichloroethane has structure:
CH₃–CHCl₃
(One carbon has 3 Cl atoms)

But regardless of the groups, in staggered conformation, the standard dihedral angle = 60°