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Published byDavid Shields Modified over 8 years ago

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1 Press Ctrl-A ©G Dear2008 – Not to be sold/Free to use Quadrilaterals Stage 6 - Year 11 Mathematic (Preliminary)

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2 Quadrilaterals - Definition Any four sided figure

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3 Quadrilaterals - Square All sides are equal length All angles are equal (90 o ) Opposite sides are parallel Diagonals bisect each other at 90 o. Diagonals bisect corners (45 o ) 45 o Square Dancing

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4 Quadrilaterals - Rectangle Golden Rectangle Opposite sides - equal length All angles are equal (90 o ) Opposite sides are parallel Diagonals bisect each other Diagonals are equal in length.

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5 Quadrilaterals - Rhombus All sides are equal length opposite angles are equal Opposite sides are parallel Diagonals bisect each other at 90 o. Golden Rhombus abab = 1.618 a b

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6 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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7 Quadrilateral - Trapezium One, and only one, pair of parallel sides School Desks Two Triangles Press

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8 Quadrilateral - Kite Two pairs of equal adjacent sides One pairs of equal angles

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