Introduction to reflections | Maths | Quizalize & Oak National Academy

Starter quiz

When a vertex is labelled M $^{\prime}$ , it means the __________ of M.
- object
- sense
- centre of rotation
- image ✓
- line of reflection
Which point on the image is corresponding to vertex A on the object?
- b
- c ✓
- d
A transformation is a process that may change the size, orientation, or __________ of a shape.
- 'position' ✓
In which of these images is the orientation invariant when compared to its object?
- image 1
- image 2
- image 3 ✓
- image 4
In which of these images has the direction of the orientation reversed when compared to its object - where the direction of ABCD on the object is clockwise?
- image 1
- image 2 ✓
- image 3
- image 4
Which property may not be invariant when an object is rotated?
- length of a side
- size of an angle
- position ✓
- orientation ✓
- sense

Which of these sentences uses the word "sense" correctly?
- The sense of a word stays the same after translation because I can still read it ✓
- The sense of a word changes after rotation because it is harder to read
- The sense of a word changes if its letters look they've been written backwards ✓
- The sense of a word stays the same after reflection because I can figure it out
In which of these images has the sense changed compared to the object?
- image 1 ✓
- image 2
- image 3
- image 4 ✓
- image 5
Which of these transformations change sense?
- translation
- rotation
- reflection ✓
- enlargement
Complete this sentence: "When an object is reflected, the lengths of its sides are invariant. This means the lengths of the sides remain _______ ."
- 'the same' ✓
Which of these diagrams shows a reflection?
Which of these images is a reflection of its object?
- image 1 ✓
- image 2 ✓
- image 3
- image 4

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Just because the sense has changed, it doesn't mean a reflection has occurred.

If an image has a different sense to its object, there has definitely been a reflection - the line of reflection may be at an obscure angle.

Reflection - A reflection of a shape is the mirror image of the shape. An object is reflected when it is flipped over a fixed line.
Sense - The sense of an object is the direction of the orientation of the object.