不ふ等とう辺へん四し辺へん形けい

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Meanings

noun

trapezium; trapezoid

geometry

A quadrilateral with no parallel sides. In Japanese geometry, this term specifically refers to a general quadrilateral without any parallel sides, distinguishing it from 台形 (trapezoid with one pair of parallel sides) and 平行四辺形 (parallelogram).

不ふ等とう辺へん四し辺へん形けいは、どの辺へんも平へい行こうでない四し角かっ形けいです。
A trapezium is a quadrilateral with no parallel sides.