Unit 3 Flashcard

Front

What is a reflection in geometry?

Back

A transformation that produces a mirror image of a figure across a line of symmetry.

Front

Which transformation flips a figure over a line?

Back

Reflection.

Front

How do you translate a figure to a new position?

Back

By moving it a certain distance in a specified direction.

Front

What is the result of translating triangle ABC to triangle A'B'C' if the translation is left 2 and up 9?

Back

The new position of triangle A'B'C' is obtained by moving triangle ABC left 2 units and up 9 units.

Front

What does rotation mean in geometry?

Back

A transformation that turns a figure about a fixed point at a given angle and direction.

Front

What is the difference between translation and rotation?

Back

Translation moves a figure without changing its orientation, while rotation turns a figure around a point.

Front

What is the line of symmetry?

Back

A line that divides a figure into two mirror-image halves.

Front

What is the effect of a reflection across the y-axis?

Back

It flips the figure horizontally, changing the sign of the x-coordinates.

Front

What is a transformation?

Back

An operation that moves or changes a figure in some way to produce a new figure.

Front

What does it mean to dilate a figure?

Back

To resize a figure by a scale factor, either enlarging or reducing it.