Triangles
- Equilateral triangle given side a.
- Isosceles triangle given base b and one side.
- Isosceles triangle given base b and altitude h.
- Scalene triangle given sides a, b and c.
Quadrilaterals
- Square given side a.
- Rectangle given sides a and b.
- Rectangle given diagonal d and base b.
- Definitions: trapezoid and trapezium (BrE vs AmE).
Polygons inscribed in a circle
- General method to draw regular polygons inscribed in circles.
- Equilateral triangle inscribed in a circle.
- Square inscribed in a circle.
- Regular pentagon inscribed in a circle.
- Hexagon inscribed in a circle.
- Regular octagon inscribed in a circle.
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| Triangle, hexagon, square and octagon. DPG E1E |
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| Square, trapezium and rectangles AVS E1E |
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| Hexagon and heptagon. CGI E1E |
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| Pentagon AAM E1D |
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| Nonagon. LAG E1E |
