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# Shapes

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by

## Jon Crew

on 27 September 2013

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#### Transcript of Shapes

Shapes
Shape - what we will do this week
Identify, visualise and describe properties of 3D shapes; use these properties to sort 3D shapes; Recognise and describe properties of polygons; Classify quadrilaterals
Starter
Find lines of symmetry.
In Pairs draw as many shapes as you can in three minutes with only one line of symmetry.

Now swap with another pair to compare.
Who has the most unusual shapes?
Now draw as many shapes as you can with at least 2 lines of symmetry in five minutes.
Main Focus -Sort 3D shapes according to their properties; Visualise 3D shapes from 2D drawings
Get into a circle.
We are going to look at some 3D shapes
What is the same about these two shapes and what is different? (Key words: faces, vertices, edges,)
Sorting
How could we sort our shapes into 2 sets, so that every shape appears in one but not both sets, i.e. there is no overlap?
Car
This is one way - Carroll Diagram
in small groups select a shape - now describe it to the others - can they guess it?
Key words: Vertices, edges, faces, sides
Bonds to 100

Starter
On your white boards draw a 3 by 4 grid. Write in the numbers to make 100.
Visualise 3D shapes from 2D drawings;
Describe properties of prisms and pyramids
Main Activity
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/3d/index.htm
Can you name theses shapes?
Have a look at these prisims.
http://www.learner.org/interactives/geometry/3d_prisms.html
What do prisims have in common?
Have a look at these pyramids?
What do they have in common?
http://www.learner.org/interactives/geometry/3d_pyramids.html
Look at these prisms
Write the shape of the two ends faces, then the number of faces and vertices in a table.

For a new shape - can you predict the number of faces and vertices?
Can you write the number of edges?

Chose all of them or the non- triangular shapes

Plenary
Report back to the class what you discovered
Starters
Times tables
Fill in as many numbers as they can in five minutes.
Choose six facts which you had difficulty remembering and learn them for homework.

Main Activity
Describe properties of 2D shapes including polygons.

Choose a shape.
Work in 2s to write at least five facts about it.
Share your results remember: regular/non-regular; number of vertices and sides; number of right angles/obtuse/acute angles; lines of symmetry and also its name.

Is a circle and oval, semi-circle polygons?

I have chosen a secret shape.
or 'No'
Activities
This is isometric paper.
Draw five equilateral triangles next to each other.
How many different shapes can you make?
Starter Place value - in four-digit numbers

In pairs make a 6 digit number
(use different coloured pencils)
Take it in turns to roll a 1 to 6 dice.
If you roll a digit which is in your
number, you score its value,
e.g. if you write 4326 and roll 3,
you score 300.

between you agree
What is different and what is the same.
Whose shape has at least one pair of parallel sides? What shapes have these?
Whose shape has at least one pair of perpendicular sides?
Whose shape has four right angles and is regular?