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There are many ways of describing the rule. Perhaps the simplest is to premultiply the coordinates of any point by the matrix:( 0 -1 )

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Related Questions

Rule for 90 degrees counterclockwise rotation?

(x,y)-> (-y,x)


What is 90 degrees counterclockwise?

Clockwise means turning to your right, counterclockwise is to the left.


How many degrees has triangle ABC been rotated counterclockwise about the origin?

180 degrees.


How do you rotate a polygon 90 degrees counterclockwise about the origin?

{1 0} {0 -1}


What is the image of 1 -6 for a 90 counterclockwise rotation about the origin?

(-1, -4) rotated 90 degrees anticlockwise


What is the image of the point (43) if the rotation is 90 degrees?

The answer will depend on whether the rotation is clockwise or counterclockwise.


How do you rotate a triangle 90 degrees counterclockwise?

Rotating a triangle 90 degrees counterclockwise would involve taking an upright triangle and laying is toward the left on its back. Changing position through rotation can cause a better visualization for some problem solving.


What is tilted 90 degrees?

Something that is tilted 90 degrees has been rotated a quarter turn clockwise or counterclockwise from its original orientation. This means it is now perpendicular to its original position.


What is the image of point (-1-2) if the rotation is 90 degrees?

The answer will depend on whether the rotation is clockwise or counterclockwise.


How do a 90 counterclockwise look like?

A 90-degree counterclockwise rotation involves turning an object or point 90 degrees to the left around a specified pivot point. For example, if you imagine a point on a Cartesian coordinate system, moving it 90 degrees counterclockwise would shift its position from, say, (1, 0) to (0, 1). This transformation effectively swaps the x and y coordinates and changes the sign of the new x-coordinate.


What is the rule for a pair of perpendicular lines?

They intersect at 90 degrees


Suppose a figure is located in quadrant 1. Which of the following will result in an image that is located in quadrant 3?

A) Rotate 360 degrees counterclockwise, then shift 1 unit up. B) Rotate 180 degrees counterclockwise, then shift 1 unit down. C)Rotate 90 degrees counterclockwise, then shift 1 unit up. D) Rotate 270 degrees counterclockwise, then shift 1 unit down.