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2D Shapes

Objectives

To describe and visualise common 2D shapes.

Resources

Abacus Workbook 1 | Range of plastic 2D shapes or 📄 2D shapes sheet | Cardboard box or shoe box (or similar) | Dice | Sticky labels | Ruler | Shapely Lines (NRICH) | Assignment 6

Vocabulary

shapes | right angle | right angled triangle | sides | pentagon | hexagon | octagon

Today's Lesson

Assignment

This lesson works towards Assignment 6. Please access the assignment for details about what you will need to submit to your student's Wolsey Hall tutor.

What to Get Ready

Hide a right-angled triangle from the range of shapes behind a ‘wall’ (the side of a box or piece of paper) so that the right angle appears first. The right angle is the corner which could belong to a square.

Cut up six sticky labels and label them ‘5’, ‘5’, ‘6’, ‘6’, ‘8’, ‘8’. Stick these onto the faces of the dice.

Introduction

Ask your student to say what the shape that you have hidden might be. Why do they think that?

Point out that the shape has a ‘square’ corner, or a right angle.

Ask your student to say what shapes it could not be (for example, a circle).

Slowly slide the shape up to reveal a second corner.

Ask them why it could not be a square or rectangle. What might it be?

Finally reveal the whole shape.

Repeat with a range of other 2D shapes, hiding them and slowly sliding them out from behind the wall.

Main Activity

Your student should roll the customised dice with the numbers (5, 5, 6, 6, 8, 8) on the faces.

They then have to use a ruler to draw a shape on the dotty paper on Assignment 6 with the same number of sides as the number they roll.

If they roll the same number a second or third time, they have to draw a different looking shape with that number of sides.

They should then label each shape with its correct name. Your student should aim to draw and label at least 4 shapes on the assignment sheet.

Note: The completed assignment should be submitted to your student's Wolsey Hall tutor at the end of Step 18 Lesson 5.

Extra Challenge

Ask your student to create 5, 6 and 8 sided shapes through the ‘Shapely Lines’ activity.

PLAY - Shapely Lines (NRICH)

Workbook

To help your student build upon their learning from today, please ask them to complete the activities on page 23 of Abacus Workbook 1.

Citations

[1] nrich.maths.org