Perimeter of a Triangle

In this page perimeter of a triangle we are going to see example problems to find the perimeter of triangle.

Formula:

Let a, b and c is the sides of the triangle. Then the perimeter

P = a + b + c

Now let us see some example problems to understand this concept much better.

Example 1:         

The sides of a triangle are 12 cm, 6 cm and 8 cm.find the perimeter of the triangle.

Solution:

Let a, b and c are the three sides of the triangle

a = 12 cm, b = 6 cm and c = 8 cm

Perimeter P = 12 + 6 + 8

                 = 26 cm

Therefore the perimeter of a required triangle = 26 cm


Example 2:  perimeter of a triangle

The sides of a triangle are 5 cm; 7 cm and 9 cm find the perimeter of the triangle.

Solution:

Let a, b and c are the three sides of the triangle

a = 5 cm, b = 7 cm and c = 9 cm

Perimeter P = 5 + 7 + 9

                 = 21 cm

Therefore the perimeter of a required triangle = 21 cm


Example 3:

The sides of a triangle are in the ratio 2x, 3x and 5x. If the perimeter of the triangle is 100 then find the measurement of three sides.

Solution:

Let a, b and c be the three sides of the triangle

a = 2x, b = 3x  and c = 5x

Perimeter P = 2x + 3x + 5x

                 = 10 x

Perimeter of triangle = 100 cm

                        10 x =100

                           x = 100/10

                          x = 10 cm

Therefore a = 2x = 2(10) = 20   cm

              b = 3x = 3(10) = 30 cm

              c = 5x = 5(10) = 50 cm


Quote on Mathematics

“Mathematics, without this we can do nothing in our life. Each and everything around us is math.

Math is not only solving problems and finding solutions and it is also doing many things in our day to day life.  They are: 

It subtracts sadness and adds happiness in our life.    

It divides sorrow and multiplies forgiveness and love.

Some people would not be able to accept that the subject Math is easy to understand. That is because; they are unable to realize how the life is complicated. The problems in the subject Math are easier to solve than the problems in our real life. When our people are able to solve all the problems in the complicated life, why can we not solve the simple math problems?

Many people think that the subject math is always complicated and it exists to make things from simple to complicate. But the real existence of the subject math is to make things from complicate to simple.”

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