Numbers Directed Numbers Many of the numbers we use represent situations which have directions as well as size The numbers which ha...

  • Angles of Elevation and Depression
    Angles of Elevation and Depression The  angle of elevation  of an object as seen by an observer is the angle between the horizontal an...
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    What is an Equation An equation says that two things are equal. It will have an equals sign "=" like this: x + 2 = 6 That ...
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    Quadrilaterals Quadrilateral just means "four sides" ( quad  means four,  lateral  means side). A Quadrilateral has  four-s...