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QuadrilateralsQuadrilateralsStage 6 - Year 11Stage 6 - Year 11

Mathematic(Preliminary)

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Quadrilaterals - Definition

Any four sided figure

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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

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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.

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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