Surveying Calculations - Links to Interesting Sites

Heron Triangles and Heron's Formula by D. Krizova
Heron's Formula and Brahmagupta's Generalization
Heron's Mahematics by Michael Lahanas

Law of Cosines (Cosine Rule) by Alexander Bogomolny
The Cosine Law by Alan Selby, Ph. D

Sine Law from Seneca College web site

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This page is maintained by Bob Burtch and was last updated on 15 March 2005.
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