Paulo Ferro

@pauloferro.com

8 Followers 37 Following

Math teacher. Author of the book Mastering Geometry Puzzles. pauloferro.com

A triangular tiling in the form of a regular hexagon composed by six equilateral triangles.
Fibonacci Sequence.
Asger Aaboe.
Equilateral triangle.
A circle labeled/labelled C with center/centre labeled/labelled O and its radius labeled/labelled r.
Dudeney's dissection.
Zero.
A birthday hat.
A square made with the seven tangram pieces: five right(-angled) triangles, one square and one parallelogram.
Trapezoid/trapezium made with seven matchsticks.