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Triantanacht An Staidéar ar Thriantán
Teoirim Phíotagarás Ar thriantán dronuilleach, is ionann achar na cearnóige a tharraingítear ar an taobhagán agus suim nan-achar sna cearnóga a tharraingítear ar an dá shlios eile.
x^2 = 64 + 36. x = 10
sin A an slios urchomhaireach/an taobhagán
cos A an slios cóngarach/an taobhagán
tan A an slios urchomhaireach/an cóngarach
cos 72°18' 0.3040
sin A = 0.5216 31.44°
Triantán Dronuilleach Triantán le uillin 90
Triantán Comhchosach Triantán le dhá slois agus an da uillin ag an mbun mar an gcéana.
Trántán Comhshleasach Triantán le achan slois mar an gceanna
Teoirim Phíotagarás T^2 = U^2 + C^2
Suim na dtrí uillin i dtriantán ná 180
Created by: newmanderval