Translations
A transformation that slides a figure without changing its size or shape.
The line over which a figure is reflected
What is the line of reflection/mirror line?
The fixed point around which a figure rotates
Number of lines of symmetry in a square
What is 4?
A rigid transformation that preserves distance and angle measure
What is an isometry?
The image of point (3,4) translated 2 units right and 3 units up
The coordinates after reflecting (x,y) over the x-axis
What is (x,−y)?
The standard direction for positive angle rotation
What is counterclockwise?
Type of symmetry where a figure can be rotated less than 360° to match itself
What is rotational symmetry?
Term for shapes that are exactly the same size and shape
What are congruent figures?
In the notation (x,y)→(x+h,y+k), what h and k represent
The type of reflection followed by a translation parallel to the line of reflection
What is a glide reflection?
The rotation angle needed for a regular hexagon to coincide with itself
What is 60 degrees?
Number of lines of symmetry in a regular pentagon
What is 5?
The original figure before a transformation
What is the pre-image?
The result when combining two or more translations
Point A(4,-3) is reflected on the line y=-x. A' will be this.
What is A'(3,-4)?
The point A(4,-3) is rotated 90 degrees counterclockwise. A' will be this.
What is A'(-3,-4)?
The minimum rotation that creates symmetry in a regular octagon
What is 45 degrees?
Term for a transformation that changes orientation
What is a rotation or reflection?
If point A translates to A' and then to A", the distance from A to A" compared to the sum of A to A' plus A' to A"
The result of reflecting over two parallel lines
The result of two reflections over intersecting lines
What is a rotation of twice the angle between the lines?
A figure with infinite lines of symmetry
The combination of two or more transformations