plane polygons

the following links direct to:

triangles

1. equilateral triangle, given its side
2. equilateral triangle, given its centre and one vertex
3. equilateral triangle, given the circumscribed circle and the direction of an edge
4. equilateral triangle, given the apothem
5. isosceles triangle, given the size of the larger edge
6. right triangle, given the hypotenuse and one cathetus
7. a triangle, given its midpoints
8. a triangle, given the orthocentre and the circumcentre

quadrangles

1. square, given the median lenght
2. square, given the diagonal
3. square, given the edge
4. square, given the apothem
5. rectangle, given the diagonal
6. rhombus, given one of the diagonals
7. rhombus, given the edge

regular pentagon

1. regular pentagon inscribed in a circle #01
2. regular pentagon inscribed in a circle #02
3. regular pentagon inscribed in a circle #03
4. regular pentagon inscribed in a circle #04
5. regular pentagon, given its edge lenght

regular hexagon

1. regular hexagon, given the large diagonal
2. regular hexagon, given the edge lenght
3. regular hexagon, given the short diagonal
4. regular hexagon, given the apothem

regular octagon

1. egular octagon, given the large diagonal
2. regular octagon, given the edge lenght #01
3. egular octagon, given the edge lenght #02

regular decagon

1. regular decagon inscribed in a circle
2. regular decagram inscribed in a circle