SOLUTION: the sail abc has side length a-b = 5 metres b-c = 6 metres and a-c=7 metres what is the area

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Question 356143: the sail abc has side length a-b = 5 metres b-c = 6 metres and a-c=7 metres what is the area
Answer by mananth(16946) About Me  (Show Source):
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the sail abc has side length a-b = 5 metres b-c = 6 metres and a-c=7 metres what is the area
sides are 5,6,7
sum of all sides = 18
1/2 perimeter = 9 =s
...
Area+=+sqrt%28s%28s-a%29%28s-b%29%28s-c%29%29
Area+=+sqrt%289%289-5%29%289-6%29%289-7%29%29
Area+=sqrt%28%289%2A4%2A3%2A2%29%29
area+=+sqrt%28216%29
area = 14.7 m^2