| 单词 | right-angled trigonometry | 
| 释义 | > as lemmasright-angled trigonometry   right-angled trigonometry  n. Mathematics now rare trigonometry that deals with right angles and right-angled figures. ΘΚΠ the world > relative properties > number > geometry > 			[noun]		 > branches of > trigonometry trigonometry1614 right-angled trigonometry?a1729 ?a1729    J. Ward Posthumous Wks. 		(1730)	  i. iv. 88  				In the Solution of the preceding six Cases of right-angled Trigonometry, it is to be observ'd, that the Proportions might have been varied. 1828    Moore's Pract. Navigator 		(ed. 20)	 38  				Solution of the Six Cases in Right-angled Trigonometry. 2003    Math. Gaz. 87 256  				Pythagoras' theorem; right-angled trigonometry; linear factorisation [etc.]. < as lemmas | 
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