Question

Two sides of a triangle are 13 cm and 14 cm and it's semiperimeter is 18 find the third side of the triangle?

Answer 1

Answer:

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Answer 2

Answer:

9 cm

Step-by-step explanation:

The length of two sides of a triangle are 13 cm and 14 cm.

Semi perimeter of the triangle is 18.

Let three sides of triangle be a cm, b cm, and c cm.

Length of two sides are given ,

So let us consider, a=13 cm and b=14 cm.

The formula of semi perimeter is = 1/2 * (sum of length of three sides of a triangle)

So, according to the given problem , to know the length of third side of the triangle, we apply the formula of semi perimeter since all  other values are known.

so,

18= 1/2 * (13 + 14 + c)

18 * 2= 27 + c

36 =27 +c

c=36-27

c=9

Therefore the length of the third side of the triangle is 9 cm.