Review for Rigid Motions Test 8r

Front

What is a rigid motion?

Back

A transformation that preserves distance and angle measures, including translations, rotations, and reflections.

Front

What does it mean to rotate a figure 90 degrees counterclockwise?

Back

To turn the figure 90 degrees in the opposite direction of the clock's hands around a fixed point.

Front

What is the result of a 180-degree rotation?

Back

The figure is turned upside down, resulting in a position that is directly opposite the original.

Front

How do you translate a figure?

Back

To move every point of the figure a certain distance in a specified direction without changing its shape or orientation.

Front

What are the coordinates of a point after translating it 4 units left and 5 units down from (4, 5)?

Back

(0, 0) because (4-4, 5-5) = (0, 0).

Front

What is a pre-image in geometry?

Back

The original figure before any transformation is applied.

Front

What is an image in geometry?

Back

The resulting figure after a transformation has been applied to the pre-image.

Front

What does reflecting a figure across the y-axis do?

Back

It flips the figure over the y-axis, changing the sign of the x-coordinates of the points.

Front

If a point A(3, 2) is reflected across the x-axis, what are the new coordinates?

Back

A'(3, -2) because the y-coordinate changes sign.

Front

What is the difference between a translation and a reflection?

Back

A translation moves a figure without changing its orientation, while a reflection flips it over a line.