1-2. The sage said. O Brahmin! After preparing the AshtakaVargaa of all the Planets, including Lagna, Trikona Shodhana has to be done for each Rasi. A Trikona is made of three Rasis equidistant from each other. Thus Aries, Leo and Sagittarius, Taurus, Virgo and Capricorn, Gemini, Libra and Aquarius, Cancer, Scorpio and Pisces form the Trikonaas of the Rasis.
3-5. The Trikona Shodhana (rectification) should be done by writing the Rekhas in the AshtakaVargaas of Sun etc. under