What is the Triangle?
In geometry, a triangle is a type of polygon which have three sides. All the triangle sides may be the same or maybe not, it depends on the triangle types.
The perimeter of a Triangle
The perimeter of a triangle is the addition of all its three sides.
Perimeter of a triangle = Addition of all three sides
Perimeter of a Triangle Formula
Perimeter of a triangle ABC = AB + BC + CA
= c + a + b unit.
Solved Examples of Perimeter of a Triangle
Example 1: Determine the perimeter of a triangle whose sides are 6 cm, 8 cm, and 2 cm.
Solution:
a = 6 cm
b = 8 cm
c = 2 cm
Perimeter of a triangle = Sum of all sides = a + b + c = 6 + 8 + 2 = 16
So, the answer is 16 cm.
Example 2: Determine the perimeter of a triangle whose each length is 5 m.
Solution: Since according to the question all 3 sides are equal in length. This is called an equilateral triangle.
So a = b = c = 5 m
Perimeter of a triangle = a + b + c
= 5 + 5 + 5
= 15
Perimeter = 15 m.
Example 3: Find the Perimeter of an equilateral triangle whose one side is 4 cm.
Side of the triangle = 4 cm
Perimeter of an equilateral triangle = 3 x length of the side
= ( 3 x 4 ) cm
= 12 cm