Valence Shell Electron Pair Repulsion
Methane has 4 regions of electron density around the central carbon atom (4 bonds, no lone pairs). The resulting shape is a regular tetrahedron with H-C-H angles of 109.5°.
The methane molecule is tetrahedral. The four hydrogen atoms are positioned at the vertices of a regular tetrahedron, with the carbon atom in the centre.
Related structures H2O | NH3 | CH4 | PF5 |SF4 |ClF3 | SF6 | XeF4