Three differentiated questions then reinforce understanding of angles in a triangle, use of a protractor and introduce an investigation about fitting different triangles into a 30cm square pizza box.

This is in the Portail Royale of Chartres Cathedral. One to the square root of three For this proportion, draw an equilateral triangle of any size. Draw a line from the centre of the base to the apex.

It’s possible to construct a curve of constant width not only from an equilateral triangle but also from any polygon with an odd number of sides. Thus, you can readily obtain a curved pentagon ...

By placing this equilateral triangle between the legs of the figure, Leonardo achieves a specific proportion in the drawing. The side of the square compared to the radius of the circle yields a ...

Its premise is simple: Players are presented a geometric puzzle in the form of a task. The first level, for example, asks the player to construct an equilateral triangle from the line segment AB: ...

Named for Plato, who theorized that the classical elements were made of these regular polyhedrons, three of the Platonic solids are composed of equilateral triangles: the tetrahedron, octahedron ...