Natyashastra
विकृष्टश्चतुरश्रश्च त्र्यश्रश्चैव तु मण्डपः । तेषां त्रीणि प्रमाणानि ज्येष्ठं मध्यं तथाऽवरम् ॥ ८॥
The playhouse is of three types: square, rectangular, and triangular. Among them, the three measurements are the senior, the middle, and the inferior.
english translation
vikRSTazcaturazrazca tryazrazcaiva tu maNDapaH । teSAM trINi pramANAni jyeSThaM madhyaM tathA'varam ॥ 8॥
hk transliteration by Sanscript