Washington, D.C., formally the District of Columbia and commonly referred to as Washington, the District, or simply D.C., is the capital of the United States. The signing of the Residence Act on July 16, 1790, approved the creation of a capital district located along the Potomac River on the country's East Coast.
Now three of these sp 3 hybrid orbitals form sigma bonds by overlapping with three 1s orbitals of the three hydrogens and the remaining sp 3 hybrid orbital forms a sigma bond by overlapping with the sp 3 hybrid orbital of the other carbon which also has three Hydrogens bonded to it in the similar manner.
In fact, the carbon atoms in the single bond need not be of the same hybridisation. Carbon atoms can also form double bonds in compounds called alkenes or triple bonds in compounds called alkynes. A double bond is formed with an sp 2 hybridized orbital and a p-orbital that isn't involved in the hybridization. A triple bond is formed with an sp hybridized orbital and two p-orbitals from each atom.