# rectangle

## Fun with Dot Sheets - 1

Beginning with this issue, we start the TearOut series. In this article, we focus on investigations with dot sheets. Pages 1 and 2 are a worksheet for students, pages 3 and 4 give guidelines for the facilitator

## A Diagonal Investigation

This task is designed to give students a feel of how mathematicians ‘work’. It develops the skills of documentation, communication, reasoning and conjecture.

## Low floor High ceiling Try-Angles

In this issue’s task we work with right-angled triangles, isosceles as well as scalene. The activity has enormous scope for creativity, visualisation, investigation, pattern recognition, documentation and conjecture. Facilitators should encourage students to come up with proofs for conjectures that they make.

## Getting into Shape Tangram Time

The objective of this 'Low Floor High Ceiling' activity series is to challenge the problem-solving skills of students and in attempting them, each student is pushed to his or her maximum potential. There is enough work for all but as the level gets higher, fewer students are able to complete the tasks.

## When does it have Maximum Area? ~ A GeoGebra Exploration

Use GeoGebra to check when will a rectangle have maximum area when it is inscribed in a triangle.

## Triangle in a Rectangle

Find the area of an inscribled triangle...

## Teaching area through graphs

This article describes how graph sheets can be used to introduce the concept of area to children. It demonstrates, with concrete examples, how the concept of area can be applied to certain geometrical figures, such as squares, rectangles, triangles or parallelogram.

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