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In a sentence
Táto krabica je štvorcová, nie obdĺžniková.
This box is square, not rectangular.
Štvorcový stôl sa lepšie zmestí do kuchyne.
A square table fits better in the kitchen.
Pozemok má štvorcový tvar a rovný povrch.
The plot has a square shape and a level surface.
Byt má šesťdesiat štvorcových metrov.
The apartment has sixty square meters.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.