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At Right Angles July 2020


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

   
Editorial

Sneha Titus
Editorial


 

Content


Content


 

Features

R Ramanujam
The Mathematical Artist of Play: A Tribute to John Horton Conway


 
 

‘A Tribute to John Horton Conway’ – Glossary of terms


 

Shailesh Shirali
What Can We Construct? – Part 1


 

Classroom

James Metz
Working Together


 
 
Rakhi Banerjee
Area of Rectangle = Length × Breadth: Conversations with a 9 year old

 

Victor Oxman & Moshe Stupel
An Angle Bisector in a Right Triangle


 
 
Arddhendu Shekhar Dash
The Approach to Teaching Fractions: Misconceptions and More


 

Haneet Gandhi & Neha Verma
Mathematical Doodling using the what-if-not approach


 
 
Anand Prakash
Magic Squares Using Semi-Primes


 

Ranjit Desai
The Generalised Pythagoras Theorem – Another Proof


 
 
A. K. Mallik
A Note on Geometric Construction

 

Shailesh Shirali
How To Prove It


 
 
A. Ramachandran
Relations Among Lengths and Angles in General Parallelograms


 

Math Space
Triangles to Tetrahedrons and beyond…

 

Student Corner


Gaurav Chaurasia
Squaring the Circle


 
 

Squaring the Circle - Editor’s Note


 

Soham Purkait
A Property of the Modulo Operation in Number Theory


 
 
Rahil Miraj
Pell’s Equation


 

Druhan R Shah & Rakshitha
Study of an Inequality Problem from an Olympiad – Part 1


 
 
Avipsha Nandi
A Friendly Pair of Triangles


 
Tech Space


Jonaki Ghosh
Dynamic Geometry Software: A Conjecture Making Tool


 

Problem Corner


A Ramachandran
Middle School Problems Requiring Exhaustive Search

 
 
Prithwijit De & Shailesh Shirali
Problems for the Senior School

 

CoMac
An ‘Extreme Algebra’ Question


 
 
CoMac
Partial Sum of Consecutive Integers Equal to a Square


 

Reviews


Rajat Sharma
A Focus on Fractions – Bringing Researchto the Classroom


 
 
Math Space
Arrow Cards


 

Shashidhar Jagadeeshan
Introducing Numberphile


 
Pullout


Padmapriya Shirali
Parallel Lines

 
The Closing Bracket


Sandhya
The Closing Bracket . . .

 
A Call for Articles



A Call for Articles

 


Specific Guidelines for Authors

 


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