Refers to an object inside a geometric figure, or the entire space inside a figure or shape.

  1. The interior angles of a polygon and the method for calculating their values.
  2. Properties of the interior angles of a triangle
  3. Defines what is meant by 'interior of an angle'
  4. Definition and properties of alternate interior angles, showing the pairs of angles associated with a transversal
  5. A discussion and example of how the interior and exterior angles of a polygon are related, especially when the polygon is concave.
  6. Definition and properties of the interior angles of a transversal