Transformations
Transformations move or change shapes without altering their size or shape. The three main transformations are translation, reflection, and rotation.
What You Need to Know
Key Concept Diagram
Translation slides a shape in one or more directions without rotating or flipping it
Reflection flips a shape over a line of symmetry (mirror line)
Rotation turns a shape around a fixed point by a given angle
After any transformation, the shape is congruent to the original
Key Vocabulary
Translation
Sliding a shape to a new position without flipping or turning it
Reflection
Flipping a shape over a mirror line to create a mirror image
Rotation
Turning a shape around a fixed centre point by a number of degrees
Congruent
Shapes that are exactly the same size and shape
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Which transformation is like sliding a piece on a chessboard?
Question 2
You flip a shape over a vertical line. This is a:
Question 3
A shape is rotated 90° clockwise. If a point was at the top, where is it now?
Key Concepts Summary
- ●Translation slides a shape in one or more directions without rotating or flipping it
- ●Reflection flips a shape over a line of symmetry (mirror line)
- ●Rotation turns a shape around a fixed point by a given angle
- ●After any transformation, the shape is congruent to the original