Interesting problems Student activity Play

Is a practical demonstration reliable? Whiteboard exercise Play

Is a practical demonstration reliable? Student activity Play

Kinds of triangles – classification by angles Simulation Play

Kinds of triangles – classification by angles Student activity Play

Kinds of triangles – classification by angles and sides Simulation Play

Kinds of triangles – classification by sides Simulation Play

Kinds of triangles – classification by sides Student activity Play

Lena's way Animation Play

Making a triangle Animation Play

Match a triangle Student activity Play

Match a triangle Whiteboard exercise Play

Miscellaneous problems Student activity Play

More constructions Student activity Play

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

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

Newton's binomial theorem Student activity Play

Newton's binomial theorem Animation Play

Note Animation Play

Numbers in the Pascal's triangle Animation Play

Obtaining the same shape with a given scale factor Whiteboard exercise Play

Other properties of metals Student activity Play

Other trigonometric ratios Student activity Play

Other trigonometric ratios Whiteboard exercise Play

Parallel and perpendicular lines Student activity Play