what is co interior angles? Share with your friends Share 0 Mohammad Mohsin answered this co interior angles are the interior angles on the same side of transversal. 1 View Full Answer Krishnan Unni answered this The interior angles on the same side of a transversal taken together form the co interior angles. They are always equal. 0 Arpit Thakral answered this if a transversal intersects two parallel lines then angles formed on the same side of it will be =to 180 these are co interior angles 0 Kavya answered this no. in the case of || lines , they are known as corresponding angles.! hope u understood. 0