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

3-D interpretation Animation Play

3-D shapes in architecture Slideshow Play

A cube Whiteboard exercise Play

A cube Student activity Play

A diagonal of a cube Animation Play

A light nanosecond Animation Play

A line in 3-D going through two points Simulation Play

A magnifying glass Animation Play

A magnifying glass Student activity Play

A magnifying glass Simulation Play

A microscope Student activity Play

A mirror and a light bulb Whiteboard exercise Play

A mirror and a light bulb Student activity Play

A radio tower Student activity Play

A radio tower Whiteboard exercise Play

A refracting telescope Animation Play

A refracting telescope Student activity Play

A square pyramid Student activity Play

A virtual image in a mirror Animation Play

Accommodation Animation Play

Adjusting sharpness Student activity Play

Adjusting sharpness Simulation Play

Adjusting sharpness Whiteboard exercise Play

Aerial Animation Play