Page 3 - LN
P. 3

Example:
           Find the perimeter of a triangle having each side length 13 cm.
           Solution:
           Perimeter of an equilateral triangle = 3 × length of a side
           Perimeter of triangle = 3 × 13
                                = 39 cm

                                               Perimeter of a Regular Pentagon
           A regular pentagon is a polygon with 5 equal sides and angles.














           Perimeter of a regular pentagon = 5 × length of one side
           Example:
           Find the perimeter of a pentagon having side length 9 cm.
           Solution:
           Perimeter of a regular pentagon = 5 × length of one side
           Perimeter of a regular pentagon = 5 × 9
                                               = 45 cm
           Video Link:  https://www.youtube.com/watch?v=9uwLgf84p5w
           Check your understanding: (NCERT Exercise – 10.1)

           Q1. Find the perimeter of each of the following figures: (a)












           Answer: Perimeter = 4 cm + 2 cm + 1 cm + 5 cm = 12 cm
   1   2   3   4