Core (from Y9 teaching programme)
• Use straight edge and compasses to construct a triangle, given right angle, hypotenuse and side (RHS); use ICT to explore constructions of triangles and other 2-D shapes
• Find the locus of a point that moves according to a simple rule, both by reasoning and by using ICT
• Explore connections in mathematics across a range of contexts: shape and space |
Extension (from Y9 objectives for able pupils)
• Know from experience of constructing them that triangles given SSS, SAS, ASA or RHS are unique, but that triangles given SSA or AAA are not
• Find the locus of a point that moves according to a more complex rule, involving loci and simple constructions. |
1000 Playthinks
~ 329 Condition triangle
~ 346 Conditional quadrilateral
MAP
Rose windows – an example of the constructions that can be made using straight edges and compasses
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Mymaths
Constructing Triangles
Constructing Shapes
Congruent Triangles
Active worksheets
Various activities
Keymaths
9-2 Chapter 15
ATM
~ Middle of middles pl12
~ Toppling squares (For the classroom; squares)
PoD
~ 3/65 The tethered goat |
Cabri / JJackson
~ More constructing triangles |
KS3 Framework - review methods p223
CORNWALL
Vocabulary and key questions related to the Framework |
Show how you can construct a square / regular hexagon / regular octagon / regular dodecahedron / equilateral triangle with just a straight edge and compasses.
Alternatively – what regular polygons can you construct just using straight edge and compasses?
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MAP - Level Ladders
~ Construction, loci
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