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  1. Chapter 14 Class 7 Symmetry
  2. Concept wise

Transcript

Rotational Symmetry - Equilateral triangleSuppose it rotates 120° The figure looks the same as previous And, Suppose it again rotates 120° The figure looks the same as previous Thus, Thus, in 1 full turn (i.e 360°) The figure is same as that of initial 3 turns So, we say that figure has rotational symmetry of order 3

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.