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At Right Angles November 2015


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Two themes dominate this issue of AtRiA: Archimedes & Magic Squares - an unlikely combination! Both are exceedingly rich topics to write about, with histories that go far back in time. Who can't be both charmed and thrilled by the story of Archimedes?

   
Editorial

Shailesh Shirali
Editorial


 

Content


Content


 

Features

Amrutha Manjunath
The Methods of Archimedes


 
 
Shailesh Shirali
3,4,5 And other memorable triples – Part II

 

Vinay Nair
Prime Magic Squares


 
 
Gourish Korpal
Folding Paper in Half

 

In The Classroom

Michael De Villiers
A 1949 Matric Geometry Question


 
 
A Ramachandran
Triangle Centres in an Isosceles Triangle

 

Swati Sircar and Sneha Titus
Getting into Shape - Tangram Time


 
 
CoMac
An Impossible Relation


 

Shailesh Shirali
Theorems on Magic Squares


 
 
CoMac
A Magic Square in Ramanujan's Honour

 

Shailesh Shirali
How to Prove It


 
 
CoMac
The Cost of Money


 

Tanuj Shah
Investigations

 

Tech Space


Jonaki Ghosh
Hill Ciphers II


 
 
Swati Sircar
Of Conics, Paper Folding and GeoGebra


 
Problem Corner


CoMac
Two Problems


 
 
R Athmaraman
Problems for the Middle School


 

Prithwijit De
Problems for the Senior School


 

Reviews


Dakshayani Suresh
Review of "The Sand Reckoner" by Gillian Bradshaw

 
 
Shashidar Jagadeeshan
Review of "Math! Encounters with High School Students" by Serge Lang

 

Pullout


Padmapriya Shirali
Thinking Skills

 


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