Geometry Transformations Rules

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

• Reflection over the y-axis

• Reflection over the x-axis

• Translation 

• Rotation 180 ° 

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Which rule describes the action of the coordinates when a figure is rotated 90^o counter-clockwise about the origin?

• (x, y)→(-y, -x)

• (x, y)→(-x, -y)

• (x, y)→(-y, x)

• (x, y)→(x, -y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Which rule describes the action of the coordinates when a figure is rotated 270^o counter-clockwise about the origin?

• (x, y)→(-y, -x)

• (x, y)→(-x, -y)

• (x, y)→(-y, x)

• (x, y)→(x, -y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Which rule describes the action of the coordinates when a figure is dilated by a scale factor of 2?

• (x, y)→(x+2, y+2)

• (x, y)→(2x, 2y)

• (x, y)→(x/2, y/2)

• (x, y)→(x-2, y-2)

Tags

CCSS.8.G.A.3

Which rule describes the action of the coordinates when a figure is reflected over the x-axis?

• (x, y)→(x, -y)

• (x, y)→(-x, y)

• (x, y)→(-x, -y)

• (x, y)→(y, -x)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Which rule describes the action of the coordinates when a figure is reflected over the line y = x?

• (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

Which rule describes the action of the coordinates when a figure is reflected over the y-axis?

• (x, y)→(x, -y)

• (x, y)→(-x, y)

• (x, y)→(-x, -y)

• (x, y)→(y, -x)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What rule represents a rotation 180 degree about the origin?

• Flip & change sign on x-value.

• Change sign on x-value and y-value.

• Flip & change sign on y-value.

• Flip x-value and y-value.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What rule represents a rotation of 90 degrees counterclockwise about the origin?

• Flip & change sign on x-value.

• Change sign on x-value.

• Flip & change sign on y-value.

• Change sign on both x-value and y-value.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

During a translation, if the figure is moving right what do you need to do to the coordinates?

• add to the x-value

• add to the y-value

• subtract from the x-value

• subtract from the y-value

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5