University of St. Andrews (UK)
University of St. Andrews: Biography of Hero
This University of St. Andrews site contains information on the life of Heron as well as his accomplishments.
Cuemath
Cuemath: Regular Polygon
Introduces the concept of regular polygons along with regular polygon examples, not regular polygons, irregular polygons, and area of a regular polygon. Check-out the solved examples for better understanding and try your hand at solving...
University of Cambridge
University of Cambridge: Nrich: Diagonal Trace
Develop problem solving skills working with pentagons and then check your results.
Geometry Help
Geometry Help: Pentagons and Hexagons
Explains the basic concept of pentagons and hexagons with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
University of Georgia
University of Georgia: Inter Math: Hexagon
This site gives the general definition of a hexagon with several diagramed examples. There are also links to related terms, everyday examples, challenging problems, more information, and the interactive check point involving hexagons...