Rotational Symmetry

Chapter 14 Class 7 Symmetry
Concept wise

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### Transcript

Rotational Symmetry - StarFor a metal, Here, the angle in the middle is Angle = (360°)/5 = 72° Suppose it rotates 72° about center The figure looks the same as previous Now suppose it rotates again 72° The figure looks the same as previous Again, it rotates 72° The figure looks the same as previous Again, it rotates 72° The figure looks the same as previous Once again, it rotates 72° The figure looks the same as previous Suppose it again rotates 72° The figure looks the same as previous Thus, Thus, in 1 full turn (i.e 360°) The figure is same as that of initial 5 turns So, we say that figure has rotational symmetry of order 5

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#### Davneet Singh

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.