|
| Find all the tetrominos
& work out area & perimeter |
|
- Know & use
formulae for area of a rectangle
- Calculate perimeter & area of shapes made
from rectangles |
|
perimeter
area
surface area
length
width
rectangle
square
metres
millimetres
centimetres
metre
kilometre
square millimetre
square centimetre
square metre
square kilometre
shape
compound shapes
2-d shapes:
rectangle, square, triangle
3-d shapes:
cube, cuboid, cylinder, hemisphere, prism, pyramid,
square-based pyramid, sphere, tetrahedron
edges
faces
vertex, vertices
net
|
|
Class discussion:
'What is area? Perimeter?' - related to tetrominos
... in general.
Which tetrominos were easier to calculate? Why?
Lead into area rules for squares & rectangles.
Develop into explanation of formulae using letters |
|
Activity
Suggestions:
1) Calculations of A & P of rectangles, including
squares.
2) Calculations of A & P of compound shapes.
(include use of correct units, see page 234) |
|
Highlight egs of
shapes that allow Qs such as:
Do shapes with same A always have same P, &
vv?
Why do A & P have different units?
OR
Find P of a shape in cm / mm. A? |
|
|
|
| Give out a variety
of nets; pupils to write down which solids they
could make; check by folding them into the solids |
|
| - Use 2-d representations
to visualise 3-d shapes; deduce some of their properties |
|
| Review names from
Starter activity;Ask pupils to sort them into groups
& use as basis for deciding on key properties. |
|
1) Individuals
/ In Pairs: Record properties of different
3-d shapes from Starter: number of edges / faces
/ vertices / names of 2-d faces / symmetry
Extend to combined shapes
OR
2) In groups: 'Guess
My Shape':
Game 1. Each pupil to have a shape/ name drawn on
a card -pupils to guess their shapes by asking Qs
, eg: 'Does it have any curved faces?'
Game 2. Shape/ name drawn on paper taped to their
back. Pupils to guess their own shapes) by asking
Qs.
OR
3) Names
These Solids...
OR
4) Drawing
cube animation |
|
Quickkfire Q/A session
on range of 3-d shapes;
OR
Q: 'How do properties change when 2 or more shapes
are combined? |
|
Pp 198 - 200
Net templates
Shape cards |
|
