NOUN: "the study of the properties of [three-sided polygons]" Crossword Clue

We have the 4-letter answer for NOUN: "the study of the properties of [three-sided polygons]" crossword clue, last seen in the Missing Letter Crossword September 10, 2025 puzzle. This answer will help you finish the puzzle you’re working on.

NOUN: "the study of the properties of [three-sided polygons]" Crossword Answer

→20.

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Helpful Hints

(adjective)
1. neat and smart in appearance
(noun)
1. the mathematics of triangles and trigonometric functions

Hint 2: Clue Definition

THREE-SIDED (adjective)
1. having three sides

Hint 3: Anagram

Unscramble the letters below to solve for today's answer.
GIRT

More Missing Letter Crossword (9/10/2025) Answers

Across

1. ADJECTIVE: "very large"

6. Achieve victory

9. "We'll be ___ best behavior"

10. Org. for physicians

11. Move stealthily

12. NOUN: "a life preserver in the form of a buoyant vest"

13. ADJECTIVE: "morally reprehensible"

14. Suffix with million or trillion

15. VERB: "to promote the growth or development of"

17. GEOGRAPHICAL NAME: "city in southeastern Wyoming population 30,816"

19. NOUN: "a puzzle in which missing numbers are to be filled into a 9 by 9 grid of squares which are subdivided into 3 by 3 boxes so that every row, every column, and every box contains the numbers 1 through 9"

21. PREPOSITION: "at or in the home or business place of"

25. NOUN: "a wine...derived during fermentation from the natural pigment in the skins of dark-colored grapes"

26. NOUN: "a light yellowish-brown cloth made usually of cotton or wool"

27. Words before glance or crossroads

28. BIOGRAPHICAL NAME: "Greek physician and writer"

29. NOUN: "[software] of a computer that can be stored on and run off of a computer disk drive"

30. Unexpected hit single, maybe

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Down

1. Canseco or Feliciano

2. ABBREVIATION: "an institution of higher learning providing facilities for teaching and research and authorized to grant academic degrees"

3. BIOGRAPHICAL NAME: "Narendra (Damodardas) 1950– prime minister of India (2014–)"

4. NOUN: "a heavy-bodied deep-voiced [amphibian] of the eastern U.S. and southern Canada that has been introduced elsewhere"

5. Mining find

6. NOUN: "a large gregarious deer...of North America, Europe, Asia, and northwestern Africa with the male having large antlers and many tines"

7. "Don't have any plans that day"

8. BIOGRAPHICAL NAME: "Ralph 1934– American consumer advocate"

14. IDIOM: "used to say that two things are equal in amount or degree"

16. NOUN: "the tough hard durable wood of [a certain] tree"

17. Tempt a visit from

18. Nike rival

19. Valuable violin, briefly

22. COMBINING FORM: "sea"

23. ___ out a living

24. NOUN: "a noncommercial often homemade or online publication usually devoted to specialized and often unconventional subject matter"

26. Org. in some Cold War movies

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