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supplementary

In everyday conversation, 'supplementary' is often used interchangeably with 'additional' or 'extra'. However, it specifically implies that the added part completes or improves something that already exists. In a mathematical context, this word has a very strict meaning. When talking about geometry, it refers only to angles that sum to 180 degrees and cannot be used to mean 'extra' in that specific setting.

💬Casual Conversation

🎬Tuesday afternoon, Chloe is procrastinating in the campus library.

Chloe Smith

did u actually read those supplementary docs? i'm totally drowning here.

Fatima

yeah, you gotta skim them or you'll be flying blind during the seminar.

💡

Chloe uses 'drowning' as a metaphor for being overwhelmed by work. Fatima uses the idiom 'flying blind', meaning to act without necessary information or guidance, emphasizing that the supplementary documents are essential for the upcoming class.

Meanings

adjective

Completing or enhancing something else when added to it; additional.

"The students were given supplementary reading materials to deepen their understanding of the topic."

adjective

In geometry, relating to two angles that add up to 180 degrees.

"Two angles are supplementary if their sum is exactly 180 degrees."

Last Updated: May 22, 2026•Report an Error