Ex 7.2, 8 - Show that angles of equilateral triangle are 60 - Ex 7.2

Ex 7.2, 8 - Chapter 7 Class 9 Triangles - Part 2

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Ex7.2, 8 Show that the angles of an equilateral triangle are 60 each. Given: ABC be an equilateral triangle. AB = BC = AC To prove: A = B = C = 60 Proof: AB = AC C = B Also, AC = BC B = A From (1) & (2) A = B = C In ABC, A + B + C = 180 A + A + A = 180 3 A = 180 A A A = B = C = 60 Hence proved

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.