Dynamic Geometry
The images are links to Euclid's constructions.
Lesson 1
To draw an equilateral triangle
Lesson 1 Lesson 2
To move a line
Lesson 2 Lesson 3
To move a line onto a line
Lesson 3 Lesson 4
To bisect an angle
Lesson 4 Lesson 5
To bisect a line 2
Lesson 5 Lesson 6
To draw a perp at a point
Lesson 06 Lesson 7
To drop a perp from a point
Lesson 7 Lesson 8
To make a triangle of three lines
Lesson 8 Lesson 9
To move an angle onto a line at a point
Lesson 9 Lesson 10
To draw a parallel through a point
Lesson 10 Lesson 11
To draw a parallelogram equal to a triangle
Lesson 11 Lesson 12
Same, but with a given width
Lesson 12 Lesson 13
To draw a parallelogram equal to a figure
Lesson 13 Lesson 14
To draw a square on a given side
Lesson 14 Lesson 15
To cut a line in golden section
Lesson 15 Lesson 16
To construct a square equal to a figure
Lesson 16 Lesson 17
To find the center of a circle
Lesson 17 Lesson 18
To draw a line touching a circle
Lesson 18 Lesson 19
To draw a complete circle given a segment
Lesson 19 Lesson 20
To bisect a circumference
Lesson 20 Lesson 21
To draw a segment with a given angle, on a given line
Lesson 21 Lesson 22
To draw a segment with a given angle, in a given circle
Lesson 22 Lesson 23
To fit a line in a circle
Lesson 23 Lesson 24
To inscribe a triangle in a circle
Lesson 24 Lesson 25
To circumscribe a triangle around a circle
Lesson 25 Lesson 26
To inscribe a circle in a triangle
Lesson 26 Lesson 27
To circumscribe a circle around a triangle
Lesson 27 Lesson 28
To inscribe a square in a circle
Lesson 28 Lesson 29
To circumscribe a square around a circle
Lesson 29 Lesson 30
To inscribe a circle in a square
Lesson 30 Lesson 31
To circumscribe a circle around a square
Lesson 31 Lesson 32
To construct a golden triangle
Lesson 32 Lesson 33
To inscribe a pentagon in a circle
Lesson 33 Lesson 34
To circumscribe a pentagon around a circle
Lesson 34 Lesson 35
To inscribe a circle in a pentagon
Lesson 35 Lesson 36
To circumscribe a circle around a pentagon
Lesson 36 Lesson 37
To inscribe a hexagon in a circle
Lesson 37 Lesson 38
To inscribe a 15-gon in a circle
Lesson 38 Lesson 39
To cut a prescribed piece from a line
Lesson 39 Lesson 40
To cut a line similar to another cut line
Lesson 40 Lesson 41
To find a third proprotional
Lesson 41 Lesson 42
To find a fourth proportional
Lesson 42 Lesson 43
To find a mean proportional
Lesson 43 Lesson 44
To describe a figure similar to a given figure
Lesson 44 Lesson 45
To describe a figure similar to one and equal to another
Lesson 45 Lesson 46
To apply a parallelogram to a line, given area and defect
Lesson 46 Lesson 47
To apply a parallelogram to a line, given area and excess
Lesson 47 Lesson 48
To divide in extreme and mean ratio (DEMR)
Lesson 48