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21 September, 21:43

Using a tape measure Becky Jo found that the circumference of the great redwood was 900cm. She estimated that its diameter was 300cm. Was her estimate a little too large or a little too small? Why?

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  1. 21 September, 22:08
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    The length of the circle - the product of the diameter and the number Pi

    l = d π

    l = 900cm

    π ≈ 3,1415 przyjmiemy wartość 3

    900cm = d * 3 [:3

    d = 300cm

    Becky rounded value of Pi, hence the difference in result

    More accurate calculation

    l = d*π

    900cm = d*3,1415

    d = 900cm : 3,1415 = 286,49cm

    Becky overestimated the outcome
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