Property 1 Pairs of alternate (interior or exterior) angles are equal.

Property 3 The sum of the interior (or exterior) angles on the same sides of the transversal is 180^(@). In other words the interior (or exterior) angles on the same side of the transversal are supplementary.

Two parallel lines are cut by a transversal , then which of the following are true ? 1. Pair of alternate interior angles are equal. 2. Pair of corresponding angles are equal 3. Pair of interior angles on the same side of the transversal are supplementary.

Two parallel lines are cut by a transversal, then which of the following are true? 1. Pair of alternate interior angles are equal. 2. Pair of corresponding angles are equal. 3. Pair of interior angles on the same side of the transversal are supplementary

If two parallel lines are cut by a transversal, then the alternate interior angles are equal

Theorem 6.2 : If a transversal intersects two parallel lines, then each pair of alternate interior angles is equal.

If a Transversal intersects two lines in such a way that a pair of alternate interior angles are equal; then the two lines are parallel.

.In the given figure,if exterior angle is 105^(@) and the interior opposite angles are equal.Find /_A" and "/_C"

If a transversal intersects two parallel lines; then each of alternate interior angles are equAL.

Interior and exterior of a quadrilateral

How many sides does a regular polygon have whose interior and exterior angles are in the ratio 2 : 1?