This lesson consists of words that can be categorized according to the prefixes uni- (which means one),  bi- (which means  two or every two), and tri- (which means three).  Other numbers have various prefixes that mean specific numbers.

Sort words beginning with the prefix "uni-" under "uni-".

Sort words beginning with the prefix "bi-" under "bi-".

Sort words beginning with the prefix "tri-" under "tri-".

Sort words that don't fit under the first three prefixes under "other numbers".

CATEGORIES:  uni-            bi-             tri-          other numbers

unicycle - bicycle - tricycle - quadrangle - unity - biweekly - trilogy - pentagon - unicorn - bisect - unique - triangle - union - octagon - universe - octopus - unison - triple - uniform - triplet - October - tripod - bilingual - trio