SOL G.3cd

Front

What is line symmetry?

Back

Line symmetry, or reflection symmetry, occurs when a shape can be divided into two identical halves that are mirror images of each other.

Front

Which letters have line symmetry?

Back

Letters with line symmetry include H, I, and X. Z does not have line symmetry.

Front

What is a transformation in geometry?

Back

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

Front

What is a 90° clockwise rotation?

Back

A 90° clockwise rotation turns a shape 90 degrees to the right around a fixed point.

Front

What is a reflection across the x-axis?

Back

A reflection across the x-axis flips a shape over the x-axis, changing the sign of the y-coordinates.

Front

What is a translation in geometry?

Back

A translation moves a shape from one position to another without changing its size, shape, or orientation.

Front

How do you translate a shape 5 units left and 1 unit up?

Back

To translate a shape 5 units left and 1 unit up, you subtract 5 from the x-coordinate and add 1 to the y-coordinate.

Front

What is the rule for translating a point (x, y) 2 units left and 3 units up?

Back

The rule is (x, y) → (x - 2, y + 3).

Front

What is the definition of rotational symmetry?

Back

Rotational symmetry occurs when a shape can be rotated around a center point and still look the same at certain angles.

Front

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

Back

A shape with one line of symmetry can be divided into two identical halves along that line.