Are Co Interior Angles Equal?

Co-interior angles are the interior angles and it sums up to 180 degrees. It means that the sum of two interior angles, which are on the same side of transversal is supplementary. Co-interior angles resemble like in “C” shape and both the angles are not equal to each other.

Are co-interior angles are always equal?

Corresponding angles are always equal. Allied (or co-interior) angles are supplementary. Vertically opposite angles are always equal.

What is the rule for co-interior angles?

Co-interior angles lie between two lines and on the same side of a transversal. In each diagram the two marked angles are called co-interior angles. If the two lines are parallel, then co-interior angles add to give 180^o and so are supplementary.