Review of Dilations, Translations, and Reflections

Front

What is a dilation in geometry?

Back

A dilation is a transformation that alters the size of a figure but keeps its shape the same, using a center point and a scale factor.

Front

What happens to the coordinates of a point during a reflection over the x-axis?

Back

The y-coordinate of the point changes sign, while the x-coordinate remains the same.

Front

What is the difference between a translation and a reflection?

Back

A translation slides a figure in a straight line without changing its shape or orientation, while a reflection flips a figure over a line.

Front

What is the pre-image in a transformation?

Back

The pre-image is the original figure before any transformation is applied.

Front

What does it mean for two angles to be congruent?

Back

Two angles are congruent if they have the same measure.

Front

What is the effect of translating a figure 3 units up on its coordinates?

Back

The y-coordinates of all points in the figure increase by 3.

Front

What is an image in geometry?

Back

An image is the result of a transformation applied to a pre-image.

Front

What is a scale factor in a dilation?

Back

A scale factor is a number that describes how much a figure is enlarged or reduced during a dilation.

Front

How does a reflection over the y-axis affect the coordinates of a point?

Back

The x-coordinate of the point changes sign, while the y-coordinate remains the same.

Front

What does it mean to enlarge a figure?

Back

To enlarge a figure means to increase its size while maintaining its shape.