Javascript Animations of 12 Constructions
by Steve Cross
Click anywhere in the construction to execute the next step,
until there are no further changes.
For more detail, see the pdf files at
Euclid's CatasQI
- C#01, p.01.01: To draw an equilateral triangle (vesica piscis)
- C#04, p.01.09: To bisect an angle
- C#05, p.01.10: To bisect a line
- C#06, p.01.11: To draw a perpendicular at a point
- C#08, p.01.22: To make a triangle of three lines
- C#09, p.01.23: To move an angle onto a line at a point
- C#10, p.01.31: To draw a parallel through a point
- C#11, p.01.42: To draw a parallelogram equal to a triangle
- C#14, p.01.46: To draw a square on a given side
- C#15, p.02.11: To cut a line in golden section
- C#16, p.02.14: To construct a square equal to a figure
Revised by Ralph Abraham and Steve Cross, 26 November 2015