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.
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.
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
A shape has rotational symmetry when it can be rotated and it still looks the same.
The order of a rotational symmetry of the given figure is | |||
Right Option : C | |||
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What is the order of rotational symmetry of the given figure ? | |||
Right Option : A | |||
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What is the order of symmetry of the given figure ? | |||
Right Option : C | |||
View Explanation |
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