Area Sem 2 2016.pptx

# Area Sem 2 2016.pptx - Spatial Thinking Area What is area...

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Spatial Thinking Area

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What is area? Area is the amount of space inside the boundary of a 2 dimensional figure The area of a 2D figure is described by the number of unit squares that are be contained within it
Units of measurement Area is generally measured in square units Eg square centimetres (sq. cm or cm 2 ) Larger areas are measured in hectares 100m x 100m = 10, 000m 2

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Finding the area of common figures Rectangle: A = L x W Triangle: A = ½ (B x H)
Examples 1

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Class Exercise Find the area of a rectangle 100m x 360 m in hectares
Finding the area of common figures Parallelogram: A = b x h Circle: A = π x r 2

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Examples 2
Class Exercise

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Examples 3
Class Exercise

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