The correct geometry around oxygen in CH3OCH3 is

The correct geometry around oxygen in CH3OCH3CH3?OCH3? (dimethyl ether) is tetrahedral.

In dimethyl ether, oxygen is bonded to two methyl groups (CH3CH3?) and has two lone pairs of electrons. This arrangement gives oxygen four electron domains, resulting in a tetrahedral geometry. The bond angles in a tetrahedral arrangement are approximately 109.5 degrees.