mathematics plz answer
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Answer:
semi-permeter of the triangle = 10 cm
so, total perimeter = 10x2 = 20 cm
length of 1 side = 5 cm
length of 2nd side = 7 cm
now, length of 3rd side = 20-(5+7)
= 20-12
= 8cm
so,length of 3rd side is 8 cm
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hope this helps you
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