If one side of a cyclic quadrilateral is produced; then the exterior angle is equal to the interior opposite angle.

If a side of the cyclic quadrlateral is produced ; then the external angle is equal to the interior opposite angles.

THEOREM (Exterior Angle Property of a Triangle): If a side of a triangle is produced the exterior angle so formed is equal to the sum of two interior opposite angles.

Exterior angle theorem: If a side of a triangle is produced; the exterior angle so formed is equal to the sum of the two interior opposite angles.

Theorem 6.8 : If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles.

one side of a triangle is produced and the exterior angle so formed is 120^(@) .if the interior opposite angles be in the ratio 3:5 .find the measure of each angles of triangle .

If the exterior angle of a quadrilateral formed by producing one of its sides is equal to the interior opposite angle, prove that the quadrilateral is cyclic.

27.Prove that an exterior angle of a triangle is equal to the sum of its interior opposite angles.

The bisectors of the angles formed by producing the opposite sides of a cyclic quadrilateral (provided that they are not parallel) intersect at right angle.

If an exterior angle of a cyclic quadrilateral be 50^(@) , then the opposite interior angle is :