Rigid Transformations, Angles, and Congruence

Front

What does it mean for two figures to be congruent?

Back

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

Front

What is a translation in geometry?

Back

A translation is a rigid transformation that slides a figure to a new position without changing its size or shape.

Front

What happens to an image during a reflection?

Back

A reflection flips the image over a line, creating a mirror image.

Front

What is the value of angle M if ∠M=133°?

Back

The value of angle M is 133°.

Front

How do you translate triangle ABC to triangle A'B'C'?

Back

Translate triangle ABC 2 units to the left and 9 units up.

Front

What does a rotation do to an image?

Back

A rotation turns the image around a fixed point at a specified angle.

Front

What is the effect of a dilation on a figure?

Back

A dilation changes the size of a figure but keeps its shape the same.

Front

What is the definition of an angle?

Back

An angle is formed by two rays with a common endpoint, called the vertex.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180°.

Front

What is the difference between a translation and a reflection?

Back

A translation slides a figure without changing its orientation, while a reflection flips it over a line.