Ch 5 : Review of Transformations

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a geometric figure in some way to produce a new figure.

Front

What are the four main types of transformations?

Back

The four main types of transformations are translation, rotation, reflection, and dilation.

Front

What is a translation?

Back

A translation is a transformation that slides a figure horizontally, vertically, or both without changing its shape or size.

Front

What is a rotation?

Back

A rotation is a transformation that turns a figure around a fixed point, called the center of rotation, by a certain angle.

Front

What is a reflection?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is a dilation?

Back

A dilation is a transformation that changes the size of a figure but keeps its shape, using a scale factor.

Front

What is the scale factor in dilation?

Back

The scale factor is a number that describes how much a figure is enlarged or reduced during a dilation.

Front

How do you reflect a point over the X-axis?

Back

To reflect a point (x, y) over the X-axis, the new point will be (x, -y).

Front

How do you reflect a point over the Y-axis?

Back

To reflect a point (x, y) over the Y-axis, the new point will be (-x, y).

Front

What is the center of rotation?

Back

The center of rotation is the fixed point around which a figure rotates.