Angle of Rotation {Ans: The degree measure a figure must rotate to look like itself again}ASA Postulate {Ans: If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, the triangles are congruent.}Order of Rotation {Ans: Number of times the rotated image looks like the pre-image.}Rule for reflection across line y=x {Ans: (x, y) --> (y, x)}Rotational symmetry {Ans: When a figure turns around its center point and looks like the pre-image before turning a full 360 degrees.}Hypotenuse Leg Theorem {Ans: If two right triangles have a congruent hypotenuse and a pair of congruent, corresponding sides, then the two triangles are congruent.}Transformation {Ans: Changing a figure in some way. Size, orientation or location may change.}Rule for rotation of 180 degrees around the origin {Ans: (x, y) --> (-x, -y)}Rule for reflection across the y-axis {Ans: (x, y) --> (-x, y)}Translation {Ans: Moving a figure from one location to another without changing its size, shape or orientation.}Rigid Motion {Ans: Moving an object without altering its shape or size.}Line of symmetry {Ans: Line that divides a figure in halves