Question

In a triangle , the length of the first side is 5 cm less than the length of the second side . The length of the third side is 7 cm more than the length of the first side if the first side is of length is 18 cm , then what is the semiperimeter of the triangle?​

Answer 1

Given :-

A triangle the length of the first side is 5 cm less than the length of the second side . The length of the third side is 7 cm more than the length of the first side if the first side is of length is 18 cm ,

To Find :-

Semi-perimeter

Solution :-

Let the second side be 'b' and third side be 'c'

When the second side is 5 cm less than other

b = 18 - 5

b = 13 cm

Now

c = 18 + 7

c = 25

Sides of triangles are 25 cm,13 cm,18 cm

Now

Semi perimeter = a + b + c/2

S = 18 + 13 + 25/2

S = 18 + 38/2

S = 56/2

S = 28 cm

Semi-perimeter is 28 cm

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Answer 2

Answer:

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