







A diamond slope, or the slope of the angle bisector, is considered in this note as a generalization of two wellknown slope relationships. This general approach is compared then with wellknown approaches using various examples.

AUTHOR(S): Gregory V. Akulov




An example of a problem in algebra or trigonometry that is motivated by an exercise with a graphing calculator. The graph leads to an exercise with a trigonometric identity.

AUTHOR(S): Rick Seaman




In this note the authors give an expression for locating the midpoint of a circular arc and a calculator for determining the midpoint.

AUTHOR(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.

AUTHOR(S): Oleksandr (Alex) G. Akulov




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.

AUTHOR(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.

AUTHOR(S): Gregory V. Akulov and Oleksandr G. 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.

AUTHOR(S): Gregory V. Akulov




A trigonometric identity is used to develop a formula for the slope of a rhombus diagonal. This expression is then used to find the velocity of a whale.

AUTHOR(S): Gregory V. Akulov and Oleksii V. Akulov




In this article Judi and Harley illustrate the seven frieze patterns using art of the indigenous peoples of North America. They then develope some of the mathematics of frieze patterns at a level that is accessible to many students. The teacher notes contain activities with frieze patterns for students at all levels.

AUTHOR(S): Judi McDonald and Harley Weston




This article is part of the Mathematics Notes series at Washington State University. In the article, Judi and Harley start by determining the functions that map the plane back onto itself, while at the same time, mapping a specified line back onto itself and preserving the size and shape of any objects represented in the plane. These are the functions that preserve frieze patterns. The authors then look at the algebraic structure of this collection of functions under the operation of composition, show that there are only seven frieze groups, and illustrate how they are generated. Each frieze group is represented algebraically and geometrically. The article concludes with a tour of the Washington State University campus, looking at the ways in which frieze groups are exhibited and used in our immediate surroundings.

AUTHOR(S): Judith J. McDonald and J. Harley Weston




In this note Gregory uses his Arc Midpoint Computation formula to devise a problem regarding riding a bicycle around the University of Victoria campus.

AUTHOR(S): Gregory V Akulov




This one of the articles in the seventh edition of Ideas and Resources for Teachers of Mathematics, a newsletter published by the Saskatchewan Mathematics Teachers' Society. The theme of the seventh edition is patterning and algebra and in this article Alain shows how experiments can be used to make connections between formulas and real life situations.

AUTHOR(S): Alain Gauthier




In this note Gregory creates a problem inspired by the Luther Invitational Tournament (LIT), a longstanding basketball tournament at Luther College High School in Regina.

AUTHOR(S): Gregory Akulov




This note is in the twelth edition of Ideas and Resources for Teachers of Mathematics, a newsletter published by the Saskatchewan Mathematics Teachers' Society. It announces some short courses to be offered in Saskatoon in the Summer of 2000.

AUTHOR(S): Saskatchewan Mathematics Teachers' Society




Continuing his discussion of circular arc midpoint computation Oleksandr develops an expression for the midpoint of a circular arc in n dimensions.

AUTHOR(S): Oleksandr G. Akulov
