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  1. Chapter 11 Class 7 Perimeter and Area
  2. Serial order wise

Transcript

Example 10 Find BC, if the area of the triangle ABC is 36 cm2 and the height AD is 3 cm (Fig 11.21). Height = h = AD = 3 cm Base = b = BC = ? Given, Area of ∆ABC = 36 cm2 1/2 × b × h = 36 1/2 × BC × 3 = 36 BC × 3/2 = 36 BC = 36 × 2/3 BC = 12 × 2 BC = 24 cm ∴ BC is 24 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 9 years. He provides courses for Maths and Science at Teachoo.