Question

find the perimeter of triangle
having length of its sides
as 20cm, 15cm and and 9cm.​

Answer 1

Answer :-

• The perimeter of triangle is 44cm.

Step-by-step explanation :

To Find :-

• The perimeter of triangle

Solution :-

Given that,

• The three sides of the triangle are 20cm, 15cm and 9cm

As we know that,

Perimeter of triangle = a + b + c,

Where,

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

According the question,

=> side a + side b + side c

=> 20cm + 15cm + 9cm

=> ( 20 + 15 + 9 ) cm

=> ( 35 + 9 ) cm

=> 44cm

• The perimeter of triangle is 44cm.

Know more :-

Some more information related to Triangle :-

• Perimeter of triangle = side a + side b + side c
• Sum of all Interior angles of a triangle = 180°
• Semi-perimeter of triangle = { side a + side b + side c } ÷ { 2 }
• Area of triangle ( by heron's formula ) = √s(s-a)(s-b)(s-c)

Answer 2

Given :-

• Shape = Triangle
• Length of first Side = 20cm
• Length of Second Side = 15cm
• Length of Third Side = 9cm

To Find :-

• Perimeter of the Triangle

Solution :-

➞ Perimeter of Triangle = Side + Side + Side

➞ Perimeter of Triangle = 20 + 15 + 9

➞ Perimeter of Triangle = 35 + 9

➞ Perimeter of Triangle = 44cm

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Therefore, Perimeter of the Triangle is 44cm

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★ Additional Info :

Formulas Related to Perimeter :

• Perimeter of Parallelogram = 2(Base + Height)
• Perimeter of Triangle = Side + Side + Side
• Perimeter of Rectangle = 2(Length + Breadth)
• Perimeter of Square = 4× Side
• Perimeter of Rhombus = 4 × Side
• Perimeter of Hexagon = 6 × Side
• Perimeter of Heptagon = 7 × Side
• Perimeter of Octagon = 8 × Side

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