The perimeter of a triangle is 26.6 cm. Two of its side are 7.1 cm and 9cm . Find the lenght of the third side of the triangle
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perimeter = sum of the three sides
26.6=7.1+9+third side
26.6-16.1=third side
10.5= third side
26.6=7.1+9+third side
26.6-16.1=third side
10.5= third side
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