Friday, 13 February 2015
Thursday, 12 February 2015
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Numbers Directed Numbers Many of the numbers we use represent situations which have directions as well as size The numbers which ha...
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Quadrilaterals Quadrilateral just means "four sides" ( quad means four, lateral means side). A Quadrilateral has four-s...
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Angles of Elevation and Depression The angle of elevation of an object as seen by an observer is the angle between the horizontal an...