1 Unit 3 Vocabulary

The mapping, or movement, of all points of a figure in a plane according to a common operation is called a _____.

• translation

• transformation

• reflection

• rotation

A transformation that creates an image that is congruent to its preimage is called a _____.

• rigid transformation

• non-rigid transformation

• dilation

• mapping

A(n) ___ changes the size of a figure but not its location or orientation.

• rigid transformation

• isometry

• non-rigid transformation

• reflection

A(n) ____ is a figure before a transformation has taken place.

• pre-image

• image

• isometry

• mapping

The result of a transformation is called a(n) _____.

• pre-image

• image

• isometry

• mapping

A mapping that preserves distance while moving a figure to another location using reflections, rotations or translations.

• transformation

• rigid transformation

• non-rigid transformation

• isometry

A(n) ___ is a line that acts as a mirror so that corresponding points are the same distance from the mirror.

• line of reflection/ line of symmetry

• line of rotation

• line symmetry

• mapping

A figure has ____ if the figure can be mapped onto itself by a reflection.

• rotational symmetry

• line symmetry

• isometry

• transformational symmetry

A figure in a plane has ____ if the figure can be mapped onto itself by a turn of 180 degrees or less.

• rotational symmetry

• line symmetry

• isometry

• transformational symmetry

Two figures are ___ if they are the same size and have the same shape.

• similar

• congruent

• transformational

• isometrical