Congruent Figures- Two figures that have exactly the same shape and size. The corresponding sides and angles are congruent (exact same).

Corresponding Sides- a pair of sides from similar or congruent figures that are in the same position (matching position).

Corresponding Angles- a pair of angles from similar or congruent figures that are in the same position and are the same measure.

Translation- A shift of a graph horizontally, vertically, or both, which results in a graph of the same shape and size, but in a different position. SLIDE!

Rotation-A transformation that turns a figure about a fixed point at a given angle and a given direction. SPIN!

Reflection- A transformation of a figure that flips (or mirrors) the figure across a line. FLIP!

Transformation- A change in size or position of a figure.

Composite Transformation- A combination of transformations.

Rigid Motion- a transformation that preserves length, angle measure, and area.

Edge- A line segment joining two vertices in a geometric figure.

Symmetry- A line along which a plane figure can be folded so the two parts match.

ASA triangle congruence- two triangles are congruent if two angles and the included side of one triangle are congruent to two angles and the included side of the other.

AAS triangle Congruence- If two angles and the non-included side of one triangle are congruent to the corresponding two angles and the non-included side of another triangle then the two triangles are congruent.

SSS Triangle Congruence- When three sides of one triangle are congruent to the corresponding three sides of another triangle then the triangles are congruent.

SAS Triangle Congruence- two triangles are congruent if two sides and the included angle of one triangle are congruent to two sides and the included angle of the other.

Rotational Symmetry- the ability to rotate an object less than 360 degrees and the object looks like it did before it rotated.