Construction of regular polygons Student activity Play

Construction of triangles Animation Play

Corresponding sides Whiteboard exercise Play

Corresponding sides and angles Student activity Play

Creating symmetrical triangles Whiteboard exercise Play

Crossing lines cut by two parallel lines Animation Play

Definition of enlargement Student activity Play

Demonstration of the formula for the area of a triangle Whiteboard exercise Play

Demonstration or proof? Animation Play

Demonstration or proof? Student activity Play

Diminution Animation Play

Dividing an equilateral triangle Animation Play

Dividing an equilateral triangle into nine congruent triangles Whiteboard exercise Play

Dividing an n-sided polygon into triangles Animation Play

Dividing the circle into six equal parts Animation Play

Dividing the polygon into triangles Whiteboard exercise Play

Do you remember what a polygon is? Student activity Play

Does the triangle exist? Whiteboard exercise Play

Doilies in the shape of polygons Whiteboard exercise Play

Drawing a hexagon inscribed in a circle Student activity Play

Drawing a triangle symmetrical to a point Student activity Play

Drawing a triangle symmetrical to a point Whiteboard exercise Play

Drawing an equilateral triangle Animation Play

Drawing an equilateral triangle inscribed in a circle Student activity Play

Drawing an equilateral triangle inscribed in a circle Whiteboard exercise Play