1. divisions of something into three equal parts
Usage: mathematics; geometry

Examples

• The geometry problem required finding the trisections of the angle.
• Ancient mathematicians studied angle trisections extensively.
• The trisections of the circle created three equal arcs.
• Students learned that exact trisections of arbitrary angles are impossible with compass and straightedge.
• The architect used trisections to divide the building’s facade into three sections.
• Mathematical proofs show the limitations of certain trisections.