Question

The sides of a triangle are 13 cm, 14 cm and 15 cm, then the. perimeter of a triangle is ______ .
$(a)42cm$
$(b)49cm$
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Answer 1

Answer:

perimeter is sum of all sides

so

42 cm

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Answer 2

To find : perimeter of triangle

Given :  sides of a triangle are $13cm, 14cm, 15cm$ .

Solution :

• We know that , perimeter of triangle is sum of three side of triangle .
• If a, b, c are the sides of triangle then,

        $Perimeter \ of \ triangle = a + b +c$

• Therefore , perimeter of triangle = $13 cm + 14 \ cm + 15\ cm$

                                                               $= 42 \ cm$

Hence , perimeter of triangle is $42 \ cm$ .