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  1. Chapter 2 Class 7 Fractions and Decimals
  2. Serial order wise
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Example 7 The side of an equilateral triangle is 3.5 cm. Find its perimeter. Perimeter = Sum of all sides = 3.5 + 3.5 + 3.5 = 3 × 3.5 = 3 × 35/10 = (3 × 35)/10 = 105/10 = 10.5 cm Thus, Perimeter = 10.5 cm

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.