the two sides of triangle are 5cm and 9cm the perimeter of the triangle is 20cm then the length of third side is
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Answer:
6cm
Step-by-step explanation:
let third side = x
perimeter of a triangle = sum of all sides
20cm = 5+9+x cm
20 = 14 + x cm
20-14 = x
6=x
therefore third side = 6cm
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