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OpenStudy (anonymous):
What is the area of the equilateral triangle? Round to the nearest square centimeter. cm2 http://static.k12.com/calms_media/media/1579000_1579500/1579376/1/69b4235641678bb4a783843e64e765726723b636/MS_IMC-150126-130915.jpg
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OpenStudy (anonymous):
@iGreen
OpenStudy (anonymous):
Use the formula: 1/2abSin(C)
OpenStudy (anonymous):
1/2(30)(3)Sin(60) = 389.71cm^2
OpenStudy (anonymous):
which is rounded to 390?
OpenStudy (anonymous):
yeah ^^ if the question asks you to round of to the nearest whole number :)
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