the side of triangle 50m, 65m, and 65, find the cost of laying grass in the plot at the rate of red 7 per m2
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use √ S (s-a) (s-b) ( S-c )
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Perimeter of a triangle =50 + 65 +65=180
7×90 (180÷2)
7×90=630
7×90 (180÷2)
7×90=630
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