1 press ctrl-a ©g dear2008 – not to be sold/free to use quadrilaterals stage 6 - year 11...
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©G Dear2008 – Not to be sold/Free to use
QuadrilateralsQuadrilateralsStage 6 - Year 11Stage 6 - Year 11
Mathematic(Preliminary)
2
Quadrilaterals - Definition
Any four sided figure
3
Quadrilaterals - Square
•All sides are equal length•All angles are equal (90o)•Opposite sides are parallel•Diagonals bisect each other
at 90o.•Diagonals bisect corners (45o)
45o
Square Dancing
4
Quadrilaterals - Rectangle
GoldenRectangle
•Opposite sides - equal length•All angles are equal (90o)•Opposite sides are parallel•Diagonals bisect each other•Diagonals are equal in length.
5
Quadrilaterals - Rhombus
•All sides are equal length•opposite angles are equal•Opposite sides are parallel•Diagonals bisect each other
at 90o.Golden Rhombus
ab
= 1.618
ab
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Quadrilaterals - Parallelogram
•Opposite side are equal length•Opposite angles are equal•Opposite sides are parallel•Diagonals bisect each other
making congruent triangles
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Quadrilateral - Trapezium
•One, and only one, pair of parallel sides
School Desks
Two TrianglesPress
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Quadrilateral - Kite
•Two pairs of equal adjacent sides•One pairs of equal angles
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