6
6. Red, Green, Yellow, Black, White, Blue.
The south Korean flag has no lines of symmetry.
Africa does not have a flag
the British flag has no lines of symmetry it only has a point of symmetry (in the middle of the flag)
Africa is a continent, it does not have a flag
There is no such thing as a south America flag
The northernmost point on the African continent is on the north coast of Tunisia, near the town of Bizerte, at 37.338° north latitude. The southernmost point is on the south coast of South Africa, at Cape Agulhas near Capetown, at 34.829° south latitude. That makes a total range of 72.167° of latitude on the continent. You're free to draw as few or as many lines across that range as you'll be comfortable with. There is no 'standard' set of lines.
7
10
None.
Africa is not one country - it is many countries, each with their own flag. There is not a continental flag for Africa but there is a link below to find the flag for every country in Africa. There is an organisation called the African Union, which is like the United Nations or European Union, but in Africa. It has a flag which is mainly green and white, with a little picture of Africa in the centre.
there are none.