**"Parallels"**

## Properties of parallelograms

*By Barrie Barnard On 8 May, 2020 · Leave a Comment*

We start from this definition:

A parallelogram is a quadrilateral with both pairs of opposite edges parallel.

In this investigation you will discover some other properties of parallelograms.

Step 1: Use two different width rulers to draw a parallelogram on tracing or baking paper.

Make sure that it is […]

## Square It Game

*By toni On 26 April, 2020 · Leave a Comment*

SQUARE IT – GAME FOR TWO

Use a dotty grid and take it in turns to claim a point and mark it with your colour. The first person or team to get 4 of their markers at the vertices of a square wins the game.

PEOPLE MATHS – GAME FOR TWO […]

## Tessellating Triangles

*By toni On 18 April, 2020 · Leave a Comment*

This diagram shows 3 sets of parallel lines. What do you notice in the diagram?

Look at the triangle with angles marked 1, 2 and 3.

Call this T.

Label angles equal to these angles. Why are they equal?

Look at the larger heavily outlined triangle.

How many copies of triangle T can […]

## Years 7 – 10 What’s the Area?

*By Elizabeth Turok On 18 February, 2020 · Leave a Comment*

ADHK is a square of side length 12 cm

AB = BC= CD = AE

BE is parallel to CF

EI is parallel to FJ

GE is parallel to AD

Can you find the side lengths of the different shapes?

Justify your answers.

The area of JGK is 20 cm².

Can […]

## Line Match

*By toni On 1 July, 2018 · Leave a Comment*

Explain your findings about the four lines in this diagram and their gradients.

Match each sketch graph from column A below with a description and a fact about gradients from the other two columns.

Click here for the Notes for Teachers.

## Grades 7 to 9 Ratty

*By toni On 22 November, 2016 · Leave a Comment*

If you know the sizes of the angles marked with coloured dots in the diagram which angles can you find by calculation? Explain your reasoning.

If you also know that AB and CD are parallel which angles can you find?

What extra information do you need to find all the numbered angles?

[…]

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