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At Right Angles March 2020


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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.

Our hard copy may be delayed because of the current situation, however, do browse through the online version, download individual articles or the whole magazine and send in your feedback to [email protected]

   
Editorial

Shailesh Shirali
Editorial


 

Content


Content


 

Features

B. Sury
Tiresome Paths, Water Gates & Euler’s Formula


 
 
Shailesh Shirali
Sums of Cubes


 

Classroom

CoMaC
Chika’s Test for Divisibility by 7


 
 
Vinay Nair
Trials with Triangles

 

Haragopal R
Hara’s Triangle and Triple


 
 
Math Space
LFHC: Summing V


 

Ashok Prasad
Conversations on Greatest Common Divisor


 
 
Arddhendu Shekhar Dash
Justification of 90° Angle Construction Procedure


 

Vishak Vikranth
Product Numbers


 
 
A Ramachandran
A Word and an Idea

 

Radhakrishnamurty
Geometrical Proof of an Application of Ptolemy’s Theorem


 
 
Shailesh Shirali
Pretty Power Play

 

Swati Sircar
Impossible Triangles on Dot Sheets


 
 
A. Ramachandran
Triangle Centres – Barycentric Coordinates

 

Shailesh Shirali
Euler’s Inequality fo the Circumradius and Inradius of a Triangle


 

Tech Space


M Srinivasan
Introducing Robocompass


 

Problem Corner


A Ramachandran
Middle School Problems Requiring Exhaustive Search

 
 
Prithwijit De & Shailesh Shirali
Problems for the Senior School

 

Shailesh Shirali
Adventures in Problem Solving


 
 
A Ramachandran
Solutions to Search Problems


 

Reviews


M. S. Narasimhan
The Mathematics of India by P.P. Divakaran


 
 
Shailesh Shirali
The Closing Bracket...


 
Pullout


PadmaPriya Shirali
ANGLES

 


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