# Perimeter of Triangle

Perimeter is the sum of all the sides of a closed figure.
Triangle is a three-sided polygon.
Perimeter of triangle is equal to the sum of all the three sides of the triangle.
Perimeter of Triangle = Sum of its 3 sides

Question 1

Find the perimeter of a triangle of sides 11 cm, 5 cm and 8 cm?

Explanation

Given:
Ist side = 11 cm
IInd side = 5 cm
IIIrd side = 8 cm
Perimeter of triangle = Sum of its sides
= ( Ist side + IInd side + IIIrd side ) cm
= ( 11 + 5 + 8 ) cm
= 24 cm

Question 2

Find the perimeter of a triangle of sides 12 cm, 4 cm and 16 cm?

Explanation

Given:
Ist side = 12 cm
IInd side = 4 cm
IIIrd side = 16 cm
Perimeter of triangle = Sum of its sides
= ( Ist side + IInd side + IIIrd side ) cm
= ( 12 + 4 + 16 ) cm
= 32 cm

Question 3

Find the perimeter of a triangle of sides 15 cm, 5 cm and 8 cm?

Explanation

Given:
Ist side = 15 cm
IInd side = 5 cm
IIIrd side = 8 cm
Perimeter of triangle = Sum of its sides
Perimeter of triangle = ( Ist side + IInd side + IIIrd side ) cm
= ( 15 + 5 + 8 ) cm
= 28 cm

Question 4

Find the perimeter of a triangle of sides 15 cm , 11 cm and 12 cm?

Explanation

Triangle is a three-sided polygon.
Given:
Ist side = 15 cm
IInd side = 11 cm
IIIrd side = 12 cm
Perimeter of triangle = Sum of its sides
= ( Ist side + IInd side + IIIrd side ) cm
= ( 15 + 11 + 12 ) cm
= 38 cm

Question 5

Find the perimeter of a triangle of sides 3.6 cm , 2.8 cm and 4.6 cm?

Explanation

Triangle is a three sided polygon.
Given:
Ist side = 3.6 cm
IInd side = 2.8 cm
IIIrd side = 4.6 cm
Perimeter of triangle = Sum of its sides
= ( Ist side + IInd side + IIIrd side ) cm
= ( 3.6 + 2.8 + 4.6 ) cm
= 11 cm

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