trisection

Noun

countable uncountable

(geometry) The division of an angle into three equal parts.

Japanese Meaning

角を三等分すること

The trisection of a 90-degree angle cannot be accomplished with just a straightedge and compass.

90度の角を三等分することは、定規とコンパスだけでは不可能です。

Sense（1）

(geometry) The division of an angle into three equal parts.

A traditional (but impossible) mathematical problem was to achieve trisection using a straight edge and compass.

trisections

（ plural ）