Phrase guide

complementary angles

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

plural of complementary angle

Definition source: English Wiktionary via Wiktextract

Usage: form-of, plural

Topics: geometry, mathematics, sciences

Examples

  • Let angle A = 30° and angle B = 10°, so that their complementary angles are A′ = 60° and B′ = 80°, respectively.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A pair of angles that sum to a right angle.

Definition source: English Wiktionary via Wiktextract

Usage: plural, plural-only

Topics: geometry, mathematics, sciences

Examples

  • A = 30° and A′ = 60°, so A and A′ are complementary angles.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

two angles whose sum is a right angle

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: angle

History

Etymology

Complementary in the sense of completing, i.e. they form a complete right angle.

Across languages

Translations

18 source translations are retained for this English entry.

  • Arabic: زَاوِيَتَانِ مُتَتَامَّتَانِ (zāwiyatāni mutatāmmatāni) — pair of angles
  • Asturian: ángulos complementarios — pair of angles
  • Azerbaijani: tamamlayıcı bucaqlar — pair of angles
  • Catalan: angles complementaris — pair of angles
  • Chinese Mandarin: 餘角 /余角 (yújiǎo) — pair of angles
  • Estonian: täiendusnurgad — pair of angles
  • Finnish: komplementtikulmat — pair of angles
  • French: angles complémentaires — pair of angles
  • Galician: ángulos complementarios — pair of angles
  • Greek: συμπληρωματικές γωνίες (sympliromatikés goníes) — pair of angles
  • Hungarian: pótszög — pair of angles
  • Italian: angoli complementari — pair of angles
  • Japanese: 余角 (yokaku) — pair of angles
  • Māori: koki whakahāngai — pair of angles
  • Polish: kąty dopełniające — pair of angles
  • Portuguese: ângulos complementares — pair of angles
  • Spanish: ángulos complementarios — pair of angles
  • Tagalog: sihang kapuno — pair of angles