保角

保角	bǎo jiǎo	(math.) angle-preserving / conformal
保	Bǎo	Bulgaria (abbr. for 保加利亚)
保	bǎo	to defend; to protect; to keep / to guarantee; to ensure / (old) civil administration unit in the baojia 保甲 system
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