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ANSWER:

ratio = 4:7:9

sides are 4x,7x,9x

perimeter = 200

4x+7x+9x = 200

20x = 200

x = 10

Step-by-step explanation:

sides are 40,70,90

∆ = area of triangle

∆ = √(s)(s-a)(s-b)(s-c)

where s = p/2 = 200/2 = 100

∆ = √(100)(100-40)(100-70)(100-90)

= √(100)(60)(30)(10)

= 1341.6



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