Mathematics
Grade-8
Easy
Question
In rotation, the point (x, y) after moving 90° clockwise will be
- (y, -x)
- (-x, -y)
- (x, -y)
- (-x, y)
Hint:
Rotate the image with respect to origin.
The correct answer is: (y, -x)
Given That:
In rotation, the point (x, y) after moving 90° clockwise will be
>>point (x, y) will present in the 1st Quadrant.
>>Since, to rotate the point in clockwise denotes backward movement of point.
>> hence, the point is rotated to fourth Quadrant and the point changes to (y, -x).
>>>Final point obtained on rotation of (x, y) by 90 degrees clockwise is (y, -x).
* In Mathematics, rotation means the Circular movement of an object around one fixed point.
* In rotation, the image after transformation remains constant.
* Hence, it is called as a rigid transformation.
* No Change in shape and size.
* The Shape rotates counter- clockwise when the degrees is positive and rotates clockwise when degrees is negative.
Example:
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