**"Polygons"**

## Grade 9 or 10 – Enlargement

*By toni On 31 October, 2016 · Leave a Comment*

Make enlargements of the coloured shapes by fitting together four identical smaller shapes.

How much longer are the edges (the linear scale factor of the enlargement)?

How much bigger is the area (the area scale factor of the enlargement)?

Now look at the illustration of the 3-dimensional solids. One is […]

## Grades 5 to 8 – Quad Match

*By toni On 9 August, 2016 · 2 Comments*

INDIVIDUAL OR WHOLE CLASS ACTIVITY

Sort these quadrilaterals into 4 sets of 4 and describe the properties of each set.

.GROUP ACTIVITY – groups of 4

Cut out 16 cards and mix them up.

Give each member of the group 4 cards. They must exchange cards one-to-one aiming for each member to […]

## Grades 5 to 10 Find the Triangles

*By toni On 27 June, 2016 · 7 Comments*

## Grades 7 to 10 Muggles Magic

*By toni On 5 May, 2016 · 5 Comments*

If you move the 4 pieces of this jigsaw around they will fit into both outlines. One square unit has been removed in the lower shape.

You might like to cut out the pieces from the Muggles Magic Learner Worksheet and try this for yourself.

Explain what has happened to the missing […]

Each picture shows 3 similar triangles.

They are called similar because they are the same shape, they have the same angles and the lengths of the edges are in the same ratio. For example in this diagram the edges in each triangle are all in the ratio 2 : 3 : 4 […]

## Grades 4 to 7 Fractions in a Square

*By toni On 29 August, 2014 · 4 Comments*

Squares 1, 2 and 3 all have edges of length 1 unit. Some edges are divided into lengths of ½ and ¼.

The squares are split up into smaller shapes.

What can you say about those shapes and their properties?

Which shapes are similar?

The squares have area 1 square unit. What are the […]

## Grades 5 to 10 Is a Square a Rectangle?

*By toni On 5 January, 2014 · 4 Comments*

Make a record of all the rectangles that you can find in this shape.

Which rectangles are exactly the same (congruent)?

Which rectangles are similar?

Notes for Teachers – Is a Square a Rectangle?

Is a Square a Rectangle – Template

This problem is adapted from the NRICH task with the […]

Draw chords to cut a regular hexagon

(a) into two pieces which, when put together, make a parallelogram;

(b) into three pieces which, when put together, make a rhombus;

(c) into four pieces which, when put together, make two equilateral triangles.

(d) What angles can you find in each of your shapes?

(e) If […]

Look at this square divided into four pieces : two identical triangles and two identical trapezia.

The edge of length 3 from each triangle matches with the edge of length 3 from a trapezium so that the four pieces from the square now occupy a rectangular space.

The square had side length […]

## Grades 7 to 10 – Counting Triangles

*By toni On 7 January, 2013 · 2 Comments*

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