Sign In

At Right Angles March 2015

        Download Pdf version

The lead feature in the March 2015 issue of AtRiA is based on the theme Proof Without Words. In the Review section, Mark Kleiner discusses Edward Frenkel's Love and Math - the Heart of Hidden Reality. Thomas Lingefjard, in his article Learning Math with a DGE system, addresses a pressing need of teachers using technology in the classroom. This issue features a new author Ali Hussen whose article weaves in algebra, geometry and arithmetic. It also introduces a new series on Low Floor High Ceiling activities.The pullout continues on the Teaching of Geometry (part ii).


Sneha Titus






V G Tikekar
PWW Viviani's theorem

On proofs without words


Ali Ibrahim Hussen
Square roots and cube roots

Shailesh Shirali
'Understanding the formulas for Square roots and cube roots'


Punya Mishra & Gaurav Bhatnagar


In The Classroom

Shailesh Shirali
Generalization And Specialization

A Ramachandran
Angle bisectors in a quadrilateral


Shailesh A Shirali
How to prove it

Swati Sircar & Sneha Titus
Investigations with Pentominoes (Low floor high ceiling tasks)


Tech Space

Thomas Lingefjärd
Learning Mathematics with a DGE System

Problem Corner

Adventures in Problem Solving

R Athmaraman
Middle Problems


Prithwijit De and Shailesh A Shirali
Senior Problems

Extra Problem (Triangle in Rectangle)



Mark Kleiner
Review of "Love and Math"



Padmapriya Shirali
Geometry- II


> View Next: Language & Language Teaching