球面 きゅうめん三角 さんかく ほうではありませんでした
kyūmensan kaku hōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 球面三角法

1. Was not spherical trigonometry.; Was not about spherical trigonometry.

Past/Perfective
Negative
Polite
Formal Register
Mathematics