Class

Week

Time: 3 hrs Total of 6 hrs

(Part 1 of 2):
Lesson No.
Mental Starters
Learning Outcomes
Key Vocabulary
Introductory Ideas
Main Activity
Plenary
Resources
L1

1 hr
What's in a Label?
Present a labelled triangle ?ABC on board or OHT.



Â? C? BÂC? ?ABC?
AB? AC? BC?
Repeat for hexagon ABCDEF.
- Use a ruler and protractor to construct a triangle, given two sides and the included angle (SAS)

- Construct a triangle given two angles and the included side (ASA); explore these constructions using ICT
SAS
ASA
triangle
quadrilatera
lpolygon
sketch
construct
adjacent
opposite
parallel perpendicular intersect
symmetry
translate reflect
rotate
congruent
Triangles and Quadrilaterals
- Review how to construct an angle.
Eg:



- Demonstrate how to build on this to construct a triangle.
Eg:
Practical challenges involving:

1a) - triangle constructions given SAS;




1b) - constructing a triangle given ASA;




2. – using these to construct quadrilaterals:
rectangles, kites, parallelograms, squares, rhombi;




3. – and extending to regular polygons.

4. To be able to use labelling and notation accurately for lines, angles and shapes.

Eg: line AB, angle Y or XYZ, ? PQR.
Draw a parallelogram or kite, ABCD, including lengths and two interior angles.

Size of each centre angle? Interior angles? How might you construct this? Starting point? Order?

How would you label this angle? This line … ?
p. 222
L2

1 hr
Present ?ABC on board or OHT.
- How can you use two of these to make a kite? parallelogram? isosceles triangle?

- Or 4 to make a rhombus?
- How do these help you to work out the order of rotational symmetry of the final shapes?
OR
Sparks 19: Polygons
Other Polygons

- Demonstrate how to build on this to construct a polygons.

Eg:



- Highlight need to be within 1º and 1mm; impact on accuracy of pentagon made from 5 triangles.

This is a regular polygon.



- Name?
- Centre angle?
- Which eight isosceles triangles could be drawn to make it?
- Name one (?ABO).
- How would you construct it?
- Symmetry properties?
- Side properties?
- Interior angles?
p. 222

Sparks 19: Polygons
L3

1 hr
OHS S5/1: Net the Cuboid
Present a variety of 2-D nets (including red herrings) and one 3-D cuboid.
Which net(s) can make this cuboid? Which nets are red herrings?
- Use a ruler and protractor to construct simple nets of 3-D shapes, e.g. cuboid, regular tetrahedron, square-based pyramid, triangular prism
 


- Use a variety of real and drawn 3-D shapes to review names, number of faces, edges and vertices (corners).

- Ask pupils to visualise and sketch net of a large cuboid box. (then other box shapes).
More than one net?

- Collect suggested visualisation strategies from pupils.
(Eg: shade base square fold up left & right, front & back, then top.)
1. Match nets to corresponding 3-D shapes.

2. 2. Sketch nets for a variety of 3-D shapes.

3. Construct nets given dimensions of the 3-D solids.
Eg:


Extend to:
Review …
Ask pupils to identify three 3-D shapes from three unknown nets.

and link …
Show three 3-D shapes in turn.
- Can you draw a sketch of a net for this 3-D shape?
- Can you name the shape of each face?
- Front elevation?
- Side elevation?
- Plan view?
p. 222

OHS S5/1: Net the Cuboid

p. 222