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2016-01-19T22:35:52+05:30

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Perimeter of triangle = a+b+c
3+4+5
12 cm
0
2016-01-19T22:36:14+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Perimeter is the total length of the boundary of a figure. a triangle have three sides and to find its perimeter we have to add all its side.
here the length of all the sides are given i.e. 3 cm, 4cm and 5cm
so the perimeter will be 3+4+5 = 12cm
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