Four __; Ball Game Played on a Quadrilateral Court
Puzzle 8 of Nail Salon Easy Pack
Question is: Four __; Ball Game Played on a Quadrilateral Court
and the answer is: SQUARE
Word Meaning:
SQUARE — (geometry) A polygon with four straight sides of equal length and four right angles; an equilateral rectangle; a regular quadrilateral.
Definitions from Wiktionary.