Review for Reflection, Rotation, Transformation Flashcard

Front

What is reflection in geometry?

Back

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

Front

How do you reflect a point (x,y) across the y-axis?

Back

To reflect a point (x,y) across the y-axis, the new coordinates will be (-x,y).

Front

What is the result of reflecting the point (2,1) across the y-axis?

Back

The result is (-2,1).

Front

What is rotation in geometry?

Back

Rotation is a transformation that turns a figure around a fixed point, called the center of rotation.

Front

What does a 90° clockwise rotation do to a point (x,y)?

Back

A 90° clockwise rotation transforms the point (x,y) to (y,-x).

Front

What is the result of rotating the point (1,2) 90° clockwise?

Back

The result is (2,-1).

Front

What is the difference between a 90° and a 270° clockwise rotation?

Back

A 90° clockwise rotation turns the figure to the right, while a 270° clockwise rotation turns it to the left.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if their corresponding angles are equal and their corresponding sides are proportional.

Front

If triangle ABC is similar to triangle DEF, what can be said about their sides?

Back

The sides of triangle ABC and triangle DEF are proportional.

Front

What is the transformation from point A to point D if A is rotated 90° clockwise?

Back

The transformation is a 90° clockwise rotation.