the height of an equilateral triangle measures 9cm find its area correct to two places of decimals(use √3=1.73)
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tan60°=9÷x/2
solving this gives, x=6√3
further, 2×1/2×9×6√3=93.41(approx)
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Step-by-step explanation:
in an equilateral triangle, area formula is √3/4(a²)
we knew the Height
we can put the Pythagoras theorem
refer to the attachment
Attachments:
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