An isosceles trapezoid and a circle Whiteboard exercise Play

An isosceles trapezoid and a circle Student activity Play

Area of the isosceles trapezium Whiteboard exercise Play

Checking the triangle in the coordinate system Whiteboard exercise Play

Circles inscribed and circumscribed around a trapezium Student activity Play

Classification of triangles by sides Animation Play

Constructing an isosceles triangle Simulation Play

Construction of an isosceles right-angled triangle Simulation Play

Construction of an isosceles triangle Whiteboard exercise Play

How to construct an isosceles triangle Student activity Play

Isosceles trapeziums Simulation Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles and symmetry Student activity Play

Isosceles triangles and symmetry Whiteboard exercise Play

Isosceles triangles – solving problems Student activity Play

Isosceles triangles – solving problems Whiteboard exercise Play

Isosceles triangles – solving problems Whiteboard exercise 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 Student activity Play

Kinds of triangles – classification by sides Simulation Play

More constructions Student activity Play

Reasoning with angles Student activity Play

Ruler-and-compass constructions Class activity Play