Question

If perimeter of a triangle is 100cm and the length of two sides are 30cm and 40cm, the length of third side will be:

Answer 1

SOLUTION

GIVEN

Perimeter of a triangle is 100 cm and the length of two sides are 30cm and 40cm

TO DETERMINE

The length of third side

CONCEPT TO BE IMPLEMENTED

For a triangle perimeter is defined as the sum of the length of the three sides

EVALUATION

Here it is given that the perimeter of a triangle is 100cm

Now it is also stated that the length of two sides are 30cm and 40cm

Let third side = x cm

So by the given condition

$\sf{30 + 40 + x = 100}$

$\sf{ \implies \: 70 + x = 100}$

$\sf{ \implies \: x = 100 - 70}$

$\sf{ \implies \: x = 30}$

Hence the required length of third side

= 30 cm

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Answer 2

Answer:

30 cm

Step-by-step explanation: