# construction

## What Can We Construct? – Part 1

The geometers of ancient Greece invented a peculiar game for themselves, a game called Construction, whose objective is to draw various geometric figures of interest. We are permitted to use just two instruments: an unmarked straightedge (a ‘ruler’), and a compass. Using these, we can draw a straight line through any given pair of points, and we can draw a circle with any given point as centre and passing through any other given point. (Oh yes, we also possess a pencil and an eraser, please do not feel worried about that!)

## Identifying and Constructing Triangles

Get introduced to triangles, in this presentation by Swati Sircar from Shikshamitra - what they are, what they aren't, the parts that make up a triangle and the different types of them

## 3 4 5 strikes again

These are excellent GeoGebra exercises for students helping them to develop and practise skills of visualisation, logical sequencing, making connections and recalling theory. Read on.

## Constructing specific triangles

How do we construct different types of triangles using scale and compass? This has been explained in a very simple manner in the presentation given below.

## Dec 2015 Math Workshop Resources

Here is a compilation of the presentations that will come handy for the workshop.

These are developed at Shikshamitra.

## Fly a rocket

Who hasn't made paper planes and rockets in class as a child? This video will encourage teachers to make paper rockets too!

Aajwanthi and Rajkishore, in their video, show you how folding paper to make a rocket can serve as a means to teach students about angles. Students will enjoy learning how to make 15, 30, 45, 60, 75 and 90 degree angles without using a protractor and have fun launching their rockets after the class!

## How your students can become better writers

Writing is undoubtedly an integral part of the curriculum and so we compel our students to write all the time. They do dictation (and yet continue making the same mistakes!), they write answers (much of which have been memorized) and they do paragraph writing, summary writing and then creative writing. The curriculum and the school demand that students begin writing from kindergarten and by the time they are in the primary section, they are expected to construct sentences using a specific word, or generate a small paragraph about themselves.

## Construction in the classroom

Don't discard a ruler that has broken! A broken ruler can still be used to draw a line segment of a given length. Swati Sircar, from Shikshamitra, shows us how. She also shows us how to draw an angle with a given measure.

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