Title
Basic Geometric Properties of Triangles.
Abstract
In this work, we define angles between vectors and between three points. Building on this, we prove basic geometric properties of triangles, such as the Isosceles Triangle Theorem, the Law of Sines and the Law of Cosines, that the sum of the angles of a triangle is π, and the congruence theorems for triangles. The definitions and proofs were developed following those by John Harrison in HOL Light. However, due to Isabelle’s type class system, all definitions and theorems in the Isabelle formalisation hold for all real inner product spaces.
Year
Venue
Field
2015
Archive of Formal Proofs
HOL,Discrete mathematics,Inner product space,Law of cosines,Mathematical proof,Geometric shape,Law of sines,Isosceles triangle,Congruence (geometry),Mathematics
DocType
Volume
Citations 
Journal
2015
0
PageRank 
References 
Authors
0.34
0
1
Name
Order
Citations
PageRank
Manuel Eberl11113.27