2-D representation Animation Play

2-D representation Whiteboard exercise Play

2-D representations of 3-D objects on triangular dotty paper Student activity Play

2-D shapes Whiteboard exercise Play

2-D shapes Student activity Play

2-D shapes around you Slideshow Play

A decomposition of integers Whiteboard exercise Play

A department store Whiteboard exercise Play

A genealogical tree Animation Play

Analytical representation of a vector in space Whiteboard exercise Play

Analytical representation of a vector in space Student activity Play

Angles in 2-D shapes Class activity Play

Angles in 2-D shapes Whiteboard presentation Play

Application of the Pythagorean theorem in 2-D Class activity Play

Application of the Pythagorean theorem in 2-D Whiteboard presentation Play

Approximating irrational numbers Student activity Play

Approximating square root of three Whiteboard exercise Play

Approximating square root of two Whiteboard exercise Play

Are all trigonometric functions really necessary? Student activity Play

Billiard ball collisions and the velocity vectors Student activity Play

Constructions Student activity Play

Constructions Simulation Play

Constructions revisited Student activity Play

Constructions revisited Simulation Play

Creating a bar chart Student activity Play