Interoperable interactive geometry for Europe
I forgot my login data

Report a bug

Fan club

Quick Intro Videos
click to start movie
Create A Simple
GeoGebra Resource (25Mb)
click to start movie
Filing a review
click to start movie
Find a Resource

This platform is brought to you by the intergeo project, funded under the eContent Plus programme of the European commission and by partners

Circles Inscribed in Equilateral Triangle in a Square (Dr Geo geometry file)

Inscribe three equal circles in an equilateral triangle using dynamic geometry software. It is evident that: Three equal circles can be inscribed in an equilateral triangle, and each circle is in the centre of a square of which a side of the triangle is a side of the square. This construction originates from a spiral of half equilateral triangles, with a circle inscribed in each triangle. As an exercise, add more circles to this construction. File type drgeo for the Dr Geo dynamic geometry software. A coloured png image file is also on as Circlesinequilateralinsquare.png

Preview of the Resource in Action

Open or Download This File: