Question

The perimeter of a triangle is 52 cm . two of its sides are 17 and 18 cm respectively . find the length of the thired side of a triangle . ​

Answer 1

Answer:

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Step-by-step explanation:

perimeter of a triangle =sum of all sides

52=17+18+x(let third side be x)

52=35+x

52-35=x

17=x

the third side is 17cm

Answer 2

Given :-

Perimeter of the triangle = 52 cm

First side of the triangle = 17 cm

Second side of the triangle = 18 cm

To Find :-

The length of the third side of a triangle.

Analysis :-

Substitute the given values in the formula of perimeter of a triangle.

Then you can easily find the third angle.

Solution :-

By the formula,

$\underline{\boxed{\sf Perimeter \ of \ a \ triangle=a+b+c}}$

Given that,

Side a = 17 cm

Side b = 18 cm

Perimeter = 52 cm

Substituting their values,

52 = 17 + 18 + c

52 = 35 + c

By transposing,

c = 52 - 35

c = 17 cm

Therefore, the sides of the triangle are 17 cm, 18 cm and 17 cm.