MATHS

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  • Created by: India
  • Created on: 27-11-12 17:21
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  • Maths Unit 2 student bk2
    • converting measurements
      • 10mm = 1cm
      • 1000mm = 1m
      • 100cm = 1m
      • 1000m = 1km
      • perimeter = distance all the way around
    • NUMBER
      • negative and fractional indices
    • Shape and space
      • Circles
        • perimetre   circumference
          • 2?r
        • Arcs and sectors
          • area of sector
            • x/360 X  ?r squared
          • Arc  Length
            • x/360 X  2 X ? X r
        • Surface area
          • ?r squared
      • Solids
        • Any solid with parallel sides and a constant cross section is called a PRISM
          • Volume of a prism = cross sectional area X height
        • A CYLINDER is a prism with a circular cross section
          • volume of a cylinder = ?r squared X height
          • Curved surface area of a cylinder = 2?rh
        • A CONE is a pyramid with a circular base
          • volume of a cone = 1/3 X  ?r squared X height
          • curved  surface area of a cone =  ?rl (L STANDS FOR SLANT HEIGHT)
      • SIMILAR SHAPES AND SOLIDS
        • length scale factor = K
          • these are only true if they are SIMILAR SHAPES
            • area scale factor = k squared
            • volume scale factor = k cubed
        • area scale factor = k squared
        • volume scale factor = k cubed
    • probability
      • mutually exclusive = P(A) + P(B)
        • mutually exclusive = e.g. a light cannot be both off and on.
      • independent events = P(A) X P(B)
        • independent is when events dont directly effect one another
      • READ THE QUESTION, DOES IT SAY REPLACED?

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