#isosceles

The Elements of Euclid - Part 1 The sixth proposition of Book 1 of Euclid’s Elements is the converse of the first part of Proposition 1:5 (If a given triangle is an isosceles triangle, then the two angles

The Elements of Euclid - Part 1 The fifth proposition of Book 1 of Euclid’s Elements proves two things about isosceles triangles. The first of these is probably the best known property of this type of

It's raining hard today. View from the local path of the workshop dig with river stone foundations behind Workshop excavation complete Finding exact location of center of workshop columns foundation using

Today we're trying a new solution to draw perfect pentagons. It involves a metal triangle fabricated yesterday at Andi's shop to the plan's exact dimensions. Five triangles make 1 pentagon. We rotate the