GEO Ch 12 Review

Front

What type of symmetry does a shape have if it can be folded along a line and both halves match?

Back

Line Symmetry

Front

How do you reflect a point (x, y) over the x-axis?

Back

(x, -y)

Front

What is the rule for translating a point (x, y) by moving it 2 units to the right and 1 unit down?

Back

(x + 2, y - 1)

Front

What rigid motion can show that two triangles are congruent?

Back

Counterclockwise rotation of 90º about the origin

Front

What transformation occurs when a shape is moved without changing its size or orientation?

Back

Translation

Front

What is the definition of rotational symmetry?

Back

A shape has rotational symmetry if it can be rotated around a center point and still look the same.

Front

How do you reflect a point (x, y) over the y-axis?

Back

(-x, y)

Front

What is the effect of a 90º counterclockwise rotation on the point (x, y)?

Back

(-y, x)

Front

What is the definition of a reflection in geometry?

Back

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

Front

What is the difference between a translation and a reflection?

Back

A translation moves a shape without changing its orientation, while a reflection flips it over a line.