三角学

三角学	sān jiǎo xué	trigonometry
三	Sān	surname San
三	sān	three / 3
三角	sān jiǎo	triangle / (math.) trigonometry (abbr. for 三角学)
角	Jué	surname Jue
角	jiǎo	angle / corner / horn / horn-shaped / unit of money equal to 0.1 yuan, or 10 cents (a dime) / CL:个
角	jué	role (theater) / to compete / ancient three legged wine vessel / third note of pentatonic scale
学	xué	to learn / to study / to imitate / science / -ology