What island in on the 20 degree N latitude?

Answer 1

You haven't given enough explanation on the question, because I don't know whether you mean 20 degrees north, or 20 degrees south, and I don't know where abouts in east and west it is. I know that Cuba and Hawaii are at 20 degrees north, and I know that Australia is at 20 degrees south, and all them are islands.

Answer 2

Papua New Guinea itself is entirely south of the equator, covering the range of
roughly 1.5° to 10.5° South latitude.

In order to be BOTH crossed by the 20° North parallel AND southeast of Papua New Guinea,
an island would have to be at least 2,100 miles north-to-south.

There is no such island. So nothing at 20° north latitude can be SE of Papua New Guinea,
and nothing SE of Papua New Guinea can have a latitude of 20° North.

Answer 3

-- Hainan Dao (China)

-- Maug (Pacific)

-- Hawaii (big island)

-- Cuba

-- ÃŽle de la Tortue (Haiti)

Answer 4

Hainan Dao PRC, Hawaii, and Cuba is.

Answer 5

Iceland.