Answer these questions. i. Does the shape have a line or lines of symmetry? Answer yes or no. ii. How many lines of symmetry will the following shapes have? Show the lines of symmetry on the shapes that are symmetrical.

First, let's answer the question at the top of the page.

How many lines of symmetry will a regular octagon have?
A regular octagon has 8 equal sides and 8 equal angles. It has a line of symmetry passing through each pair of opposite vertices and another line of symmetry passing through the midpoint of each pair of opposite sides.
A regular octagon has $\boxed{\text{8 lines of symmetry}}$.

Now, let's answer question 3 for each shape.

3. Answer these questions.
i. Does the shape have a line or lines of symmetry? Answer yes or no.
ii. How many lines of symmetry will the following shapes have? (Note: As an AI, I cannot draw on the image, but I will state the number of lines of symmetry.)

a)
i. Yes
ii. This shape has one vertical line of symmetry.
Number of lines of symmetry: $\boxed{1}$

b)
i. Yes
ii. This shape (a semicircle) has one vertical line of symmetry.
Number of lines of symmetry: $\boxed{1}$

c)
i. Yes
ii. This arrow shape has one horizontal line of symmetry.
Number of lines of symmetry: $\boxed{1}$

d)
i. Yes
ii. This isosceles trapezoid has one vertical line of symmetry.
Number of lines of symmetry: $\boxed{1}$

e)
i. No
ii. This irregular polygon has no lines of symmetry.
Number of lines of symmetry: $\boxed{0}$

f)
i. Yes
ii. This curved shape has one horizontal line of symmetry.
Number of lines of symmetry: $\boxed{1}$

g)
i. No
ii. This irregular wavy shape has no lines of symmetry.
Number of lines of symmetry: $\boxed{0}$

h)
i. No
ii. This irregular polygon has no lines of symmetry.
Number of lines of symmetry: $\boxed{0}$

i)
i. Yes
ii. This polygon has one horizontal line of symmetry.
Number of lines of symmetry: $\boxed{1}$

Finally, let's answer the question about the flag.

Is the South African flag symmetrical?
The South African flag features a unique design with a horizontal Y-shape that divides the flag into different colored sections. Due to this asymmetrical design, it does not have any lines of symmetry.
The South African flag is $\boxed{\text{No}}$, not symmetrical.