Review for 8th grade Illustrative Math End-Of-Unit #1 test

Front

What is a 180-degree rotation?

Back

A 180-degree rotation is a transformation that turns a figure around a point (the center of rotation) by 180 degrees, resulting in a figure that is flipped to the opposite side.

Front

What is the measure of angle A' O B' if points A', B', and C' are images of 180-degree rotations of A, B, and C around point O?

Back

The measure of angle A' O B' is equal to the measure of angle A O B, as rotations preserve angle measures.

Front

What is the relationship between angles formed by rotations?

Back

When a figure is rotated, the angles formed with respect to the center of rotation remain the same.

Front

Define reflection in geometry.

Back

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

Front

What is the difference between rotation and reflection?

Back

Rotation turns a figure around a point, while reflection flips it over a line.

Front

What is a 90-degree rotation?

Back

A 90-degree rotation is a transformation that turns a figure around a point by 90 degrees, either clockwise or counterclockwise.

Front

How do you find the center of rotation?

Back

The center of rotation is the point around which a figure is rotated. It can often be found by identifying a point that remains fixed during the rotation.

Front

What is the transformation from frame #2 to frame #3 if it involves a 90-degree counterclockwise rotation?

Back

The transformation is a rotation of 90 degrees counterclockwise centered on a specific point.

Front

What is the significance of segment lengths in rotations?

Back

In rotations, the lengths of segments remain unchanged; they are preserved.

Front

What is the result of rotating a segment 180 degrees around a point?

Back

The segment will end up on the opposite side of the center of rotation, maintaining its length.