Circle, triangle, and square. They’re simple, geometric, and eerily familiar. They look like something pulled straight out of a PlayStation controller or a childhood game of tic-tac-toe.

Inside a barn, three people start to sing a song and dance. ALL: (singing) A square and a rectangle, a circle and a triangle. A square and a rectangle, a circle and a triangle. BOY: If you’re ...

Any point P with coordinates (\(x,~y\)) on the circumference of a circle can be joined to the centre (0, 0) by a straight line that forms the hypotenuse of a right angle triangle with sides of ...

The methods of triangulation which we used to measure the width of the lecture theatre can be used for much larger distances. Accurate maps and the elevations of mountains such as Everest are ...