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At Right Angles July 2019


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The July 2019 issue features Fractals on the cover - those distant and beautiful and highly mathematical creations have been brought a click away in our TechSpace section. Enjoy creating them and adding to your repertoire. We also take you through the magical tour of the beauty of mathematics starting with an article on Pentagons. Pi enters the ClassRoom section and the primary has plenty of learning - have fun joining the dots and exploring geometrical figures with different lenses. Students share their mathematical findings in two exciting articles. Our pedagogy article helps you to Understand Learners' Thinking. And the Middle School problem corner is a Do_It_Yourself hands on problem solving section. The PullOut is on Ratio. Do send in your feedback on AtRiA.editor@apu.edu.in

   
Editorial

Sneha Titus
Editorial


 

Features

Shashidhar Jagadeeshan
From Regular Pentagons to the Icosahedron via the Golden Ratio Part - I


 
 
Shailesh Shirali
The Constants Of Mathematics Part-IV


 

Shailesh Shirali
A Counter-intuitive Pythagorean Surprise


 
 

Classroom

Ananda Bhaduri
Circles Inscribed in Segments


 
 
Rahil Miraj
Radii of In-circle and Ex-circles of a Right-Angled Triangle

 

A. Ramachandran
A Path To Pi


 
 
Sabitha Raghunath & Sneha Bhansali
Pi Enters The 5th Class


 

Shikha Takker
Understanding Learners’ Thinking through an Analysis of Errors


 
 
Hara Gopal R
‘CuRe’ Triplets


 

Swati Sircar & Sneha Titus
Joining the Dots


 
 
Swati Sircar
TearOut Fun with Dot Sheets

 

Swati Sircar
Exploring Properties of Addition and Multiplication with Integers


 
 
CoMaC
Can there be SSA congruence?

 

Shailesh Shirali
How to Prove it


 
 

Tech Space


Jonaki Ghosh
Exploring Fractals – The GeoGebra Way


 

Problem Corner


A Ramachandran
DIY Problems for the MIDDLE SCHOOL

 
 
Prithwijit De & Shailesh Shirali
Problems for the SENIOR SCHOOL

 

Prithwijit De
A Geometric EXPLORATION


 
 
Shailesh Shirali
A Triangle Area Problem

 

Shailesh Shirali
Adventures in PROBLEM SOLVING


 
 
CoMaC
Computing an Angle in an Equilateral Triangle

 

Reviews


Usha Krishnamoorthy
Data, Perception and Ignorance


 
 
Pullout


PadmaPriya Shirali
Ratio

 


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