Cumaidhean co-choltach

Tha an aon chumadh air figearan co-choltach, ach mar as trice, chan eil an aon mheud annta.

Mar eisimpleir, tha dà chearcall daonnan co-choltach:

Tha dà cheàrnaig daonnan co-choltach:

Agus dh'fhaodadh dà cheart-cheàrnach a bhith co-choltach:

Ach glè thric cha bhi: