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 Géographie rencontre mathématiques à mi-chemin entre les latitudes. AUTEUR(S): Oleksandr G. Akulov A brief history and description of the 4-colour theorem and its proof. AUTEUR(S): Chris Fisher In this note Gregory describes a problem involving Dasher and Dancer moving around a Northern Light Circle. AUTEUR(S): Gregory V. Akulov A diamond slope, or the slope of the angle bisector, is considered in this note as a generalization of two well-known slope relationships. This general approach is compared then with well-known approaches using various examples. AUTEUR(S): Gregory V. Akulov Karen designed this website to assist teachers and pre-service teachers in the area of mathematics from Kindergarten to Grade 12 . Here you will find a multitude of teacher resources to assist you in incorporating Aboriginal content in your mathematics program. AUTEUR(S): Karen Arnason This resource contains instructions on building a uniform polyhedra "star ball" from modules of folded paper. Animation is used to illustrate the folding of the paper. Students are then challenged to construct other uniform polyhedra from the same modules and to discover how they can be "coloured" by using coloured paper. The construction should be possible for beginning middle year students and some of the questions challenging to students at the upper secondary level. AUTEUR(S): Stacey Wagner and Jason Stein In this note the authors give an expression for locating the midpoint of a circular arc and a calculator for determining the midpoint. AUTEUR(S): Gregory V. Akulov and Oleksandr (Alex) G. Akulov In this note the authors give an proof of the expression for locating the midpoint of a circular arc that was given in his note with Gregory V. Akulov. AUTEUR(S): Oleksandr (Alex) G. Akulov Some main concepts discussed in this Stewart Resource unit are properties of polygons, Pythagorean Theorem and Trionometric Ratios. There are five main sections each with corresponding activities. Activites include sections on Objectives, Background Knowledge, Time frame,Iinstructional Methods, Aadaptive Dimension and Assessment. AUTEUR(S): Keith Seidler and Romesh Kachroo This note is a response to a question sent to Quandaries and Queries by Ben Dixon asking how to approximate pi. Chris wrote a nice description of the method used by Archimedes in approximately 250 BC. AUTEUR(S): Chris Fisher Gregory and Oleksandr have built on the arc midpoint resource and the proof of the arc midpoint formula by constructing an algorithm for finding the coordinates of the midpoint. It is hoped that teachers of high school Mathematics and Computer Science will use these resources to enrich the teaching and learning in both subject areas. AUTEUR(S): Oleksandr G. Akulov and Gregory V. Akulov Gregory and Oleksandr extend their arc midpoint computation to determine the midpoint of a section of a sine curve. AUTEUR(S): Gregory V. Akulov and Oleksandr G. Akulov Gregory finds another application of his arc midpoint computation, this time to the kinetic energy of an object moving along a semicircle. AUTEUR(S): Gregory V. Akulov Oleksandr and Gregory extend interpretations of non-piecewise identities for sin^(-1)x+ sin^(-1)y and cos^(-1)x+ cos^(-1)y using several Euclidean geometry statements and illustrations. AUTEUR(S): Oleksandr G. Akulov and Gregory V. Akulov In this note Gregory uses a trig identity to develop an expression for the slopes of the angle bisectors of two lines in terms of the slopes of the lines that form the angle. AUTEUR(S): Gregory V. Akulov

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