90 Degree Rotation

Triangle B is rotated 90° counterclockwise with the origin as the center of rotation to create a new figure. Which rule describes this transformation?

• (x,y)→(y, -x) 

• (x,y)→(x,y)

• (x,y)→(-x,-y)

• (x,y)→(-y,x)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If you were to rotate ABCD 90° counterclockwise about the origin, what would the coordinate of A' be?

• (-5, 5)

• (-3, 5)

• (-5, 3)

• (-3, 3)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Rotate the point (7,8) around the origin 90 degrees counter clockwise. State the image of the point.

• (-7,-8)

• (8,-7)

• (-8,7)

• (8,7)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Rotate the point (-5,8) around the origin 90 degrees counterclockwise. State the image of the point.

• (-8,5)

• (8,-5)

• (-8,-5)

• (5,-8)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Find the image of triangle ABC after rotating 90 degrees counterclockwise about the origin. What are the coordinates of C' ?

• (3, -4)

• (-4, -3)

• (4, 3)

• (-3, 4)

Answer explanation

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What would be the location of A' after a 90 degree counterclockwise rotation of point (A) ?

Hint: Look for point A and apply the rule (x, y) → (–y, x)

• (-1, 2)

• (2, -1)

• (-2, -1)

• (-1, -2)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If point (5,2) is rotated counterclockwise 90° about the origin, its image will be point.

• (2,5)

• (2,-5)

• (-2,5)

• (-5,-2)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

When you rotate 90 degrees counter clockwise ( x , y ) becomes ?

• ( -x , -y )

• ( -y , x )

• ( y , x )

• ( -y , -x )

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If the rectangle were rotated 90º counterclockwise about the origin, what would be the location of K'?

• (1, -6)

• (-1, 6)

• (6, -1)

• (-6, -1)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If you were to rotate ABCD 90° counterclockwise about the origin, what would the coordinate of A' be?

• (-5, 5)

• (-3, 5)

• (-5, 3)

• (-3, 3)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5