Describing Rotations

Front

What is a rotation in geometry?

Back

A rotation is a circular movement of an object around a center (or point) of rotation.

Front

How can rotations be described?

Back

Rotations can be described using x-y coordinates.

Front

What is the angle of rotation for a full circle?

Back

360 degrees.

Front

What is the angle of rotation for a quarter turn?

Back

90 degrees.

Front

What is the angle of rotation for a three-quarter turn?

Back

270 degrees.

Front

In which direction does a clockwise rotation occur?

Back

Clockwise direction is the same direction as the hands of a clock.

Front

In which direction does a counterclockwise rotation occur?

Back

Counterclockwise direction is the opposite direction of the hands of a clock.

Front

What are the most common angles used to describe rotations?

Back

90, 180, and 270 degrees.

Front

What is the relationship between degrees and quadrants in a circle?

Back

Each quadrant in a circle is worth 90 degrees.

Front

If a point is rotated 180 degrees about the origin, what happens to its coordinates?

Back

The coordinates of the point change signs (x, y) becomes (-x, -y).