Two angles that are exterior to the parallel lines and on the same side of the transversal line are called same-side exterior angles. The theorem states that same-side exterior angles are supplementary, meaning that they have a sum of 180 degrees.
A polygon has exactly one internal angle per vertex. If every internal angle of a simple polygon is less than 180°, then the polygon is called convex. In contrast, an exterior angle (also called an external angle or turning angle) is an angle formed by one side of a simple polygon and a line extended from an adjacent side.
Angles in Transversals: Corresponding, Alternate Interior, Alternate Exterior, & Same-Side Interior
Frequently Asked Questions
What is another name for same side exterior angles?
These are sometimes known as 'F' angles. The diagram below shows parallel lines being intersected by another line. The two angles marked in this diagram are called corresponding angles and are equal to each other.
Is Complementary same side exterior?
When a transversal intersects two lines, the two lines are parallel if and only if interior angles on the same side of the transversal and exterior angles on the same side of the transversal are supplementary (sum to 180°).
What is the exterior angle of a shape?
Exterior Angle The Exterior Angle is the angle between any side of a shape, and a line extended from the next side.