Math 8: Unit 1 Mid-Unit Review

Front

What is a reflection in geometry?

Back

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

Front

What is a translation in geometry?

Back

A translation is a transformation that slides a shape from one position to another without changing its size, shape, or orientation.

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a shape around a fixed point at a certain angle.

Front

What is the line of reflection?

Back

The line of reflection is the line over which a shape is reflected to create a mirror image.

Front

What is the center of rotation?

Back

The center of rotation is the fixed point around which a shape is rotated.

Front

What is the angle of rotation?

Back

The angle of rotation is the degree measure of the turn of a shape around the center of rotation.

Front

What is the difference between a rigid transformation and a non-rigid transformation?

Back

A rigid transformation preserves the shape and size of a figure, while a non-rigid transformation may change the size or shape.

Front

What is the formula for finding the distance between two points in a coordinate plane?

Back

The distance d between two points (x1, y1) and (x2, y2) is given by the formula d = √((x2 - x1)² + (y2 - y1)²).

Front

How do you determine the coordinates of a shape after a translation?

Back

To determine the new coordinates after a translation, you add the translation vector to the original coordinates.

Front

What is the effect of a 90-degree rotation on the coordinates of a point (x, y)?

Back

A 90-degree rotation counterclockwise around the origin transforms the point (x, y) to (-y, x).