Reason: 1 Mark
Diagram: 1 Mark
Answer: 1 Mark
This figure can be divided into two equal parts in 4 ways. It has 4 lines of symmetry.

Visualisation of question: 1 Mark
Steps: 1 Mark
Concept: 1 Mark
Answer/Diagram: 1 Mark
Here, we can use reflection symmetry in order to find the minimum distance. Let's take the mirror image of house A as A'. So, for minimum distance Q must lie in centre e.g. Q must be the line of symmetry for a mirror image of house A and house B and height of A' and A are equal. So, the milkman should park his bike at the centre point of the distance between houses A and B.

a) 2 Marks
b) 2 Marks
 
(a) The piece of paper is folded 2 times.  So, when we open that piece of paper, we get 4 symmetrical squares.

(b) For this figure, we can have 6 lines of symmetry.

Completed Figures: 1 Mark each
(i)

(ii)
  
(iii)
     
(iv)
 

Diagram: 1 Mark
Labelling: 1 Mark
Naming: 1 Mark
A polygon having six lines of symmetry is a regular hexagon.

Diagram: 1 Mark
Answer: 1 Mark
Explanation: 1 Mark
For an equilateral triangle, we have 3 lines of symmetry. It can be divided into two equal parts in 3 ways.

Each Option: 2 Marks
a) Vertical mirror – A, H, I, M, O, T, U, V, W, X and Y

Horizontal mirror - B, C, D, E, H, I, O and X

To show that all the puzzle pieces are symmetrical to each other, their appropriately rotated images are given below.

Line of symmetry divides a figure into two equal halves in all aspects. Line of symmetry is the imaginary line where you could fold the image and have both halves match exactly.