CC3 Chapter 6 Transformations and Similarity

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way, such as translation, rotation, reflection, or dilation.

Front

Define translation in geometry.

Back

Translation is a transformation that moves every point of a shape the same distance in a specified direction.

Front

What is a rotation in geometry?

Back

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

Front

What is a reflection in geometry?

Back

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

Front

What is a dilation in geometry?

Back

Dilation is a transformation that changes the size of a shape but keeps its proportions the same, defined by a scale factor.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, the dimensions of a shape during a dilation.

Front

How do you find the scale factor of an enlargement?

Back

To find the scale factor, divide the length of a side of the enlarged shape by the length of the corresponding side of the original shape.

Front

What does the notation (x, y) --> (x + 2, y - 3) represent?

Back

This notation represents a translation of a point 2 units to the right and 3 units down.

Front

What is the result of a reflection across the x-axis?

Back

A reflection across the x-axis changes the sign of the y-coordinate of each point.

Front

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

Back

A reflection across the y-axis changes the sign of the x-coordinate of each point.