golden triangle
A part of various forms of mask or helmet that covers the nose and/or mouth and eyes.
(geometry) An isosceles triangle whose duplicated side is in the golden ratio to the distinct side.
present participle of dehydrogenize
p-sulphondichloraminobenzoic acid, a disinfectant used to sterilize water. / (countable) A tablet of this disinfectant.
数学者は、等しい二辺が底辺に対して黄金比になっている二等辺三角形を作図して、幾何学的な比率を示した。
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DiQt
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