According to my Windows calculator.... 0.75
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From the given information and transposing the relevant formulae its area works out as 200*sin(50)*sin(60)*sin(70) = 124.6810383 or about 125 square cm
Let the sides be s:- If: 0.5*s squared*sin(60 degrees) = 97.428 Then: s = square root of 97.428*2/sin(60 degrees) => 15.00001094 Perimeter: 3*15 = 45 cm
Area = 0.555*sin(60) = 10.825 square m to 3 decimal places
Area = 0.5*302*sin(60) = 389.711 square feet to 3 decimal places
Area = 0.5*20*20*sin(60) = 173.205 square cm to 3 decimal places