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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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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.


What is the rule for a counterclockwise rotation about the origin of 270?

A counterclockwise rotation of 270 degrees about the origin is equivalent to a clockwise rotation of 90 degrees. To apply this transformation to a point (x, y), you can use the rule: (x, y) transforms to (y, -x). This means that the x-coordinate becomes the y-coordinate, and the y-coordinate becomes the negative of the x-coordinate.


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}


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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?

Uranus is the only planet tilted 90 degrees to the right


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