Halloween Cumulative Review Units 1-3
... 1. Which diagram shows plane PQR and plane QRS intersecting only in a. c. ...
... 1. Which diagram shows plane PQR and plane QRS intersecting only in a. c. ...
Coxeter notation
In geometry, Coxeter notation (also Coxeter symbol) is a system of classifying symmetry groups, describing the angles between with fundamental reflections of a Coxeter group in a bracketed notation, with modifiers to indicate certain subgroups. The notation is named after H. S. M. Coxeter, and has been more comprehensively defined by Norman Johnson.