Trionglau / Triangles
Mae pedwar math o driongl. Mae gan bob un dri ochr, ac maen nhw鈥檔 bolygonau.
1. Hafalochrog
Mae gan drionglau hafalochrog dri ochr hafal a thair ongl hafal 60掳.
2. Isosgeles
Mae gan drionglau isosgeles ddau ochr hafal a dwy ongl hafal.
3. Ongl sgw芒r
Mewn trionglau ongl sgw芒r mae un o鈥檙 onglau yn ongl sgw芒r (90掳).
4. Anghyfochrog
Does gan drionglau anghyfochrog ddim ochrau hafal nac onglau hafal.
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