Vocabulary and Transformations

Congruence

• when a shape is enlarged

• when two figures are the same size and same shape

• when the rotation moves two quadrants

Dilation

• a transformation that enlarges or reduces a figure

• all types of transformation

• when we "flip" across a line of reflection

Image

• a slide or flip

• the original shape or figure

• a shape or figure after a transformation; the new figure

Orientation of a Figure

• the direction in which a figure is placed on a coordinate plane

• when a shape has the same side lengths

• two shapes that are not congruent

Pre-Image

• a shape or figure after a transformation, the new figure

• a transformation that rotates around the origin

• a shape or figure before a transformation; the original figure

Reflection

• a transformation that produces a mirror image of the original figure over a line of

• a transformation that rotates clockwise or counterclockwise

• when a scale is less than 1

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Rotation

• the axis that runs vertical

• a transformation that turns a figure around a center of rotation

• how we calculate the scale factor

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Translation

• a transformation that moves each point of a figure the same distance and same direction

• rotation and reflection

• a transformation that moves a figure to no specific location

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Write the rule for this translation:

Slide 2 to the left and 3 up

• $\left(x,\ y\right)\rightarrow\left(x+3,\ y-2\right)$

• $\left(x,\ y\right)\rightarrow\left(x-2,\ y+3\right)$

• $\left(x,\ y\right)\rightarrow\left(x+2,\ y+3\right)$

• $\left(x,\ y\right)\rightarrow\left(x+3,\ y+2\right)$

Identify the transformation.

• Reflection across y axis
• Reflection across x-axis
• 180 Rotation
• Translation 2 units down

Tags

CCSS.HSG.CO.A.2