The first tangent theorem – perpendicularity Student activity Play

The first tangent theorem – perpendicularity Whiteboard exercise Play

The least possible volume of the rectangular right prism Whiteboard exercise Play

The LOGO commands to obtain the given triangle Whiteboard exercise Play

The magnetic field around a conductor Whiteboard exercise Play

The magnetic field around a conductor Student activity Play

The perpendicular bisector of a line segment Animation Play

The perpendicular bisector of a line segment – a reminder Student activity Play

The prism Student activity Play

The radius of the circle inscribed into the right triangle Whiteboard exercise Play

The right prism based on a right-angled triangle Whiteboard exercise Play

The right triangle Animation Play

The set of commands Whiteboard exercise Play

The structure of the brain Student activity Play

The structure of the brain Slideshow Play

The surface area of a right prism Whiteboard exercise Play

Three-dimensional perception Animation Play

Three-dimensional vision Student activity Play

Three-dimensional vision Whiteboard exercise Play

Triangles in LOGO Student activity Play

Trigonometric ratios in a right-angled triangle Class activity Play

Trigonometric ratios in a right-angled triangle Whiteboard presentation Play

Trigonometry of a general angle Whiteboard presentation Play

Trigonometry of a general angle Class activity Play

Two mirrors Animation Play