The area of an equilateral triangle is √243/4cm².Find the length of its sides
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Step-by-step explanation:
Area of equilateral triangle = √3/4 a² where a is side length,
Therefore,
√3/4 a² = √243/4 cm² (243 = 81×3)
=>√3/4 a² = 9×√3 /4 cm²
=> a² = 9 cm²
=> a = 3 cm
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