The July 2020 issue comes into a strange new world – one in which mathematics appears as a reassuring constant. You will find plenty to take you on a magical, mathematical journey – a tribute to a memorable mathematician, investigations into constructions, discussions of pedagogical issues and great investigations to conduct and problems to solve. Nothing can take away the grimness of the pandemic situation but critical thinking, objective reasoning and sound mathematical understanding can certainly help each one of us be better problem solvers.
Vision 2020 – As we move into the 9th year of AtRiA’s existence, we refocus for clarity. The March 2020 issue talks about Breaking Down Barriers: A Mathematical Approach. Launch right into the how and what with B. Sury’s article on Tiresome Paths, Water Gates and Euler’s Formula. But there’s more than networks and circuits here, starting with this issue, we will be focusing sharply on the challenges and difficulties of the average mathematics teacher and hoping to share and discuss strategies to help those who struggle with the nature and pedagogy of mathematics. We have some wonderful material to draw you in- Conversations on the Greatest Common Divisor, Trials with Triangles, Impossible Triangles on Dot Sheets and some great Search Problems for the Middle School to mention a few. We start a new section called ViewPoint and continue with our photo series Captured Mathematics. TechSpace features the free dynamic geometry software Robocompass and our PullOut is on Angles. Our review this time is on the Mathematics of India.
AtRiA, November 2019 focuses on journeys -some are enjoyable, some tiresome, some endless. A mathematician’s journey is full of unexpected delight, simply because of unexpected detours, sudden discoveries and interesting alternatives. Have fun as you travel with us. Read all about the young Yatris and their journey of discovery in Features. This section also describes more abstract journeys from the Regular Pentagon to the Icosahedron and the Dodecahedron (Part 2) and from the familiar 2 and 3 dimensions to n dimensions in Extension of the Pythagorean Theorem. In ClassRoom, Simple Cryptography and Triangles with Integer Sides are articles sparked off by previous articles in AtRiA . An Unusual Proof of the Centroid Theorem, Modified Pascal Triangle and Orthocentre of a Triangle may motivate you to write similarly! You will find ideas in our regular columns – How to Prove It, Low Flow High Ceiling and TechSpace which features the simulation of a dice game this time. Our issue is short of 100% without the PullOut, enjoy the learning trajectory on Percentages, defined and illustrated with plenty of examples in this issue. How Craig Barton Wishes he’d Taught Maths is an excellent review by Sir Timothy William Gowers, reprinted from his Weblog.
AtRiA continues its March, July and November pattern with this, the second issue for 2019. Our cover this time is based on Jonaki Ghosh's TechSpace article on Fractals. Seen and admired from afar, and studied with a mathematician's lens, here is the greatest excitement, generating your own fractals using dynamic geometry software.
The March 2019 issue is packed with articles for students, teachers and teacher educators of all classes.
Lazy summer afternoons spent playing endless games of Sutli or hopscotch or any of those absorbing games have often become the topic of endless reminiscing about the good old days.Well, let's bring them back! With a math slant at that. Can the shapes made with knotted string lead to a better understanding of Euclidean geometry and 3D space? Can the mobiles which hang over a baby's crib be used to understand how to solve equations? Can a teacher see how easy it is to reinvent a toy or a game in order to teach a mathematical concept or two? It's time to Deja View mathematics!
The issue you hold in your hand may look the same as the previous eighteen issues but there are significant changes which I take pleasure in bringing to your notice. For one, At Right Angles is now a whole school math resource, instead of just a High School math resource, with only the PullOut catering to the primary section. To mark this change, we have included a discreet colour band at the top of each article; the code is given in the Contents Rage. It indicates whether the article is best suited for Primary (1- 5), Middle School (6-8), High School (9-10) or Pre-University (II-12). Please don't restrict your reading to just the section you teach; there is plenty there for all those interested in mathematics and as usual, we do our best to make the content accessible and engaging. You may notice that some of the ClassRoom articles also have a boxed item on the first page that indicates the scope of the article and the different ways that the teacher can make use of it. Again, don't let us contain your idea and imagination and do write to us if you think of innovative take-offs on our articles!
Celebrating the artist and his craft is not often associated with the science of mathematics. This issue of At Right Angles opens with just that - a series of problems based on Triangular Numbers presented by three mathematicians at the Institute of Mathematical Sciences, Chennai...
The word ‘heuristics’ has always left me fumbling for the perfect definition. Rule of thumb seems adequate but too informal, as a teacher trainer, I’ve always preferred to illustrate rather than define this word. And the first article in the November issue does just that- Gaurav Bhatnagar, leads you gently into the Exponential Series- a heuristic definition! The relaxed tone continues with V. G. Tikekar setting the stage to arrive at formulae which are usually given and proved using mathematical induction. He, on the other hand, uses the narrative mode to set the context which explains and then proves the sum of squares and sum of cubes formulae. From story we move to song, V. Ramprashanth’s article Tonic Ambiguity is a delightful depart from our usual articles and it explains very simply, using just the concepts of ratios, how two hearers can place the same tones at different positions on the musical scale. CoMaC and then Shailesh Shirali, wrap up the Features section with a bouquet of proofs.
It is a pleasure to share with you, our readers, the collection of articles in this, the July 2017 issue. The (un)popular view of mathematics being a terrifying subject takes a completely new twist with the first article in which a mathematician takes on a terrorist threat! The hunt for answers to a mathematical problem is usually an absorbing one, at least to aficionados of the subject but Arun Vaidya's fascinating story I M Code makes it a matter of life and death.

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