Unit 9 Retest

Front

What happens when a dilation has a scale factor greater than one?

Back

The dilation is an enlargement.

Front

What is the transformation from point A to A' if A is translated by (x+8, y+4)?

Back

The point A moves 8 units to the right and 4 units up.

Front

Which letter has ONLY rotational symmetry?

Back

The letter 'S' has only rotational symmetry.

Front

How many lines of symmetry does a shape with one line of symmetry have?

Back

It has one line of symmetry.

Front

If point X is at (1, 4), where would X' be if translated 3 units to the left and 9 units down?

Back

X' would be at (-2, -5).

Front

What is a dilation in geometry?

Back

A dilation is a transformation that alters the size of a figure but not its shape.

Front

What is the scale factor in a dilation?

Back

The scale factor is the ratio of the length of a side of the image to the length of the corresponding side of the original figure.

Front

What does it mean for a shape to have rotational symmetry?

Back

A shape has rotational symmetry if it can be rotated around a central point and still look the same at certain angles.

Front

How do you determine the number of lines of symmetry in a shape?

Back

Count the number of ways you can fold the shape so that both halves match perfectly.

Front

What is the result of translating a point (x, y) by (a, b)?

Back

The new point will be (x+a, y+b).