Rotational Symmetry
Rotational Symmetry
Rotational Symmetry:
A figure which after rotation superimposes the original figure, that is it remains symmetrical and overlaps itself after rotation is said to follow rotational symmetry.
Consider a rotating object, say a wheel of a bicycle or a wind - mill etc. The fixed point about which the object rotates is called the center of rotation.
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When an object rotates in the direction of motion of hands of a clock, rotation is called clock wise rotation; otherwise it is said to be anti-clockwise rotation.
Angle of rotation: The angle through which an object rotates (turns) about a fixed point is known as the angle of rotation.
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An object is said to take a full turn, if the angle of rotation is of . A quarter-turn means rotation by
and a three quarter-turn means rotation by
as shown below :
Rotational symmetry : A figure is said to have rotational symmetry if it fits onto itself more than once during a full turn i,e. rotation through . OR
Order of Rotational Symmetry:
The order of rotational symmetry of a shape is the number of times it can be rotated around a full circle and still overlaps the original object. The minimum order of rotational symmetry a shape can have is 1. For example, for an equilateral triangle ABC, when it is rotated about point X, will take the same shape after a rotation of angle 120° as in figure. Thus, order of rotational symmetry =.jpg)
The order of a rotational symmetry of the given figure is
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| Right Option : C | |||
| View Explanation | |||
Which of these letters of the English alphabet has both multiple line and rotational symmetries? | |||
| Right Option : A | |||
| View Explanation | |||
The order of rotational symmetry of an equilateral triangle is ___________________. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
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Manya
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Sharandeep Singh
7thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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Hridey Preet
9thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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Prisha Gupta
8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
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Manish Kumar
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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Eshan Arora
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
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Barkha Arora
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
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Om Umang
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
