Y trofannau yw'r rhannau o'r byd sydd rhwng 23°30' (23.5°) i'r gogledd a 23°30' (23.5°) i'r de o'r gyhydedd. Yn yr ardaloedd hyn mae'r haul union uwchben o leiaf unwaith y flwyddyn.
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/World_map_torrid.svg/640px-World_map_torrid.svg.png)
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Enghraifft o'r canlynol | rhanbarth ![]() |
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Math | climate zone ![]() |
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![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Tropical-area-mactan-philippines.jpg/640px-Tropical-area-mactan-philippines.jpg)
Gweler hefyd
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