直角尺

a set square (carpenter's tool)

surname Zhi / Zhi (c. 2000 BC), fifth of the legendary Flame Emperors 炎帝[Yan2 di4] descended from Shennong 神農|神农[Shen2 nong2] Farmer God

straight / to straighten / fair and reasonable / frank / straightforward / (indicates continuing motion or action) / vertical / vertical downward stroke in Chinese characters

a right angle

surname Jue

angle / corner / horn / horn-shaped / unit of money equal to 0.1 yuan, or 10 cents (a dime) / CL:個|个[ge4]

role (theater) / to compete / ancient three legged wine vessel / third note of pentatonic scale

set square (tool to measure right angles)

one of the characters used to represent a musical note in gongche notation, 工尺譜|工尺谱[gong1 che3 pu3]

a Chinese foot / one-third of a meter / a ruler / a tape-measure / one of the three acupoints for measuring pulse in Chinese medicine / CL:支[zhi1],把[ba3]