CA#7 Review - Transformations

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to create a new shape.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What are the four main types of transformations?

Back

Translation, Reflection, Rotation, and Dilation.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

Define translation in geometry.

Back

Translation is a transformation that moves every point of a shape the same distance in a specified direction.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What happens to the coordinates of a point (x,y) when it is translated left by 4 units?

Back

The new coordinates will be (x-4, y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is reflection in geometry?

Back

Reflection is a transformation that flips a shape over a line, creating a mirror image.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the line of reflection for a reflection across the y-axis?

Back

The line of reflection is the y-axis itself, where points on the left side of the y-axis are mirrored to the right side.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How do you determine if a shape has been reflected across the x-axis?

Back

If the y-coordinates of the points change sign, the shape has been reflected across the x-axis.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is a rotation in geometry?

Back

Rotation is a transformation that turns a shape around a fixed point, called the center of rotation.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What does a 90° counterclockwise rotation do to the coordinates (x,y)?

Back

The new coordinates will be (-y, x).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the effect of a dilation on a shape?

Back

Dilation changes the size of a shape but keeps its proportions the same.

Tags

CCSS.8.G.A.3