Example 6 - Chapter 2 Class 7 Fractions and Decimals

Last updated at April 16, 2024 by

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Example 6 Each side of a regular polygon is 2.5 cm in length. The perimeter of the polygon is 12.5cm. How many sides does the polygon have?Given that Length side = 2.5 cm Perimeter = 12.5 cm Now, Perimeter = Sum of all sides Perimeter = Number of sides × Length of sides 12.5 = Number of sides × 2.5 12.5/2.5 = Number of sides Number of sides = (𝟏𝟐.𝟓)/(𝟐.𝟓) Number of sides = (125/10)/(25/10) Number of sides = 125/10 "÷" 25/10 Number of sides = 125/10 ×10/25 Number of sides = 𝟏𝟐𝟓/𝟐𝟓 Number of sides = 25/5 Number of sides = 5

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.