the perimeter of a triangle is 40cm. to of ìt sides measure 12.9cm and 14.6cm. find the length of 3 sides
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Explanation:
12.9 + 14.6 =27.5
40 - 27.5=
12.5
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Perimeter = sum of all sides
40cm= 12.9+14.6+3rd side
40=27.5+3rd side
3rd side= 40-27.5
side=12.5cm
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