8th Math STAAR Review Transformations

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a figure in some way on a coordinate grid.

Front

What are the four main types of transformations?

Back

The four main types of transformations are translations, rotations, reflections, and dilations.

Front

What is a translation?

Back

A translation moves a figure a certain distance in a specified direction without changing its shape or size.

Front

What is a rotation?

Back

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

Front

What is a reflection?

Back

A reflection flips a figure over a line, creating a mirror image of the original figure.

Front

What is a dilation?

Back

A dilation resizes a figure by a scale factor, either enlarging or reducing it, while maintaining its shape.

Front

What does it mean for a transformation to preserve congruence?

Back

A transformation preserves congruence if the original figure and the transformed figure are the same size and shape.

Front

Which transformation does NOT preserve congruence?

Back

Dilation does NOT preserve congruence, as it changes the size of the figure.

Front

What is the rule for a 180-degree rotation about the origin?

Back

The rule is (x, y) -> (-x, -y).

Front

What is the rule for a reflection across the x-axis?

Back

The rule is (x, y) -> (x, -y).