Group 2 9 Weeks Final Exam

Front

What is dilation in geometry?

Back

Dilation is a transformation that alters the size of a figure but not its shape, using a scale factor.

Front

What does a scale factor of less than 1 indicate in dilation?

Back

A scale factor of less than 1 indicates a reduction in size.

Front

What does a scale factor greater than 1 indicate in dilation?

Back

A scale factor greater than 1 indicates an enlargement in size.

Front

How do you dilate a point (x, y) by a scale factor k?

Back

To dilate a point (x, y) by a scale factor k, multiply both coordinates by k: (kx, ky).

Front

What is a line of symmetry?

Back

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

Front

How many lines of symmetry does a circle have?

Back

A circle has an infinite number of lines of symmetry.

Front

How many lines of symmetry does a rectangle have?

Back

A rectangle has 2 lines of symmetry.

Front

What is the line of symmetry for a butterfly?

Back

A butterfly has 1 line of symmetry.

Front

What is the result of dilating the point (2, 3) by a scale factor of 1/2?

Back

The result is (1, 1.5).

Front

What is the result of dilating the point (0, 4) by a scale factor of 3?

Back

The result is (0, 12).