Unit 3 - Semester Exam Review

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to produce a new shape, called the image.

Front

What is a reflection in geometry?

Back

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

Front

What is a rotation in geometry?

Back

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

Front

What is a translation in geometry?

Back

A translation is a transformation that moves every point of a figure the same distance in the same direction.

Front

What does it mean for a shape to be congruent?

Back

Two shapes are congruent if they have the same size and shape, meaning one can be transformed into the other through rotations, reflections, or translations.

Front

What is the effect of a 90° rotation counterclockwise about the origin on a point (x, y)?

Back

The new coordinates will be (-y, x).

Front

What is the effect of a 180° rotation about the origin on a point (x, y)?

Back

The new coordinates will be (-x, -y).

Front

What is the effect of a reflection over the x-axis on a point (x, y)?

Back

The new coordinates will be (x, -y).

Front

What is the effect of a reflection over the y-axis on a point (x, y)?

Back

The new coordinates will be (-x, y).

Front

How many degrees should a parallelogram be rotated to carry it onto itself?

Back

180 degrees.