The sum of the exterior angles Simulation Play

The sum of the exterior angles Student activity Play

The sum of the exterior angles in an n-sided polygon Whiteboard exercise Play

The sum of the exterior angles of a convex pentagon Animation Play

The sum of the exterior angles of a convex polygon Student activity Play

The sum of the exterior angles of a convex polygon Animation Play

The sum of the interior angles in the polygons Whiteboard exercise Play

Triangle tricks Animation Play

Triangles and squares in coordinates Whiteboard exercise Play

Types of lenses Simulation Play

Types of lenses Student activity Play

Types of lenses Whiteboard exercise Play

Types of lenses Slideshow Play

Untypical reflections Student activity Play

Untypical reflections Whiteboard exercise Play

Variability of data sets Student activity Play

Visual disorders Student activity Play

Wetting and meniscus Student activity Play

Wetting and meniscus Whiteboard exercise Play

Wetting of the sides of a container Animation Play

What are similar shapes? Student activity Play

What is a perimeter? Student activity Play

What is a perimeter? Animation Play

What is an area? Student activity Play