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Ex 12.2, 1 (e) Which of the following figures have rotational symmetry of order more than 1: Since circle is divided into 3 equal sectors, Angle at center = (360°)/3 = 120° Let’s rotate it by 120° This figure looks same as previous Suppose it rotates 120° again This figure looks same as previous Again it rotates 120° This figure looks same as previous 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 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.