Teacher development

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'CuRe' TRIPLETSArticle | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

O n observing the triple (25, 125, 225) in which 125 is a perfect cube, 25 and 225 are perfect squares, and the three numbers are in arithmetic progression (AP), I fel

Understanding Learners' Thinking through an Analysis of ErrorsArticle | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

In this article, I have argued that it is important not to bunch all the students’ errors as “careless mistakes” or “over-generalisations”.

A path to πArticle | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

Consider the following situation. A regular polygon of n sides is placed symmetrically inside another regular polygon of n sides i.e.

Radii of In-circle and Ex-circles of a Right- Angled TriangleArticle | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

In this article, I provide a relation connecting the lengths of the tangents from the vertices of a right-angled triangle to its incircle and ex-circles, in terms of i

Circles Inscribed in SegmentsArticle | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

As I was going through Evan Chen’s Euclidean Geometry for Mathematical Olympiads, I came across in this remarkable problem.

A Counter-intuitive PYTHAGOREAN SURPRISEArticle | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

Imagine a tightly stretched rope from one end of the field to be 100m; so the length of the rope is 100m.

The Constants of Mathematics - Part 4Article | By At Right Angles | Aug 09, 2019  | Mathematics | 0 Likes

In this article, we continue our exploration of Euler’s constant e.

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