Alternate interior angles Animation Play

Angle sum in some polygons Animation Play

Angle sum of a polygon Student activity Play

Angle sum of a triangle Simulation Play

Angle sum of a triangle – observation and proof Student activity Play

Corresponding angles Animation Play

Exterior and interior angles Animation Play

Exterior and interior angles of a triangle Student activity Play

Filtration Animation Play

Finding the measure of interior angles Whiteboard exercise Play

Finding the sum of the interior angles Whiteboard exercise Play

Finding the surface area of a ring Student activity Play

Interior and exterior angles Animation Play

Interior and exterior angles in polygons Class activity Play

Interior and exterior angles in polygons Whiteboard presentation Play

Interior and exterior angles of a quadrilateral Student activity Play

Mutual position of lines and interior angles in a triangle Class activity Play

Mutual position of lines and interior angles in a triangle Whiteboard presentation Play

Parallel lines and corresponding angles Student activity Play

Reabsorption and tubular secretion Student activity Play

Sum of the angles in a quadrilateral Simulation Play

Surface area of a ring Animation Play

The exterior and interior angles of a quadrilateral Whiteboard exercise Play

The exterior and interior angles of a triangle Whiteboard exercise Play

The exterior angle of a regular polygon Student activity Play