{"book":"adl0131","page":72,"text":"كتاب ۶۱ مساحت\n\n۱۰ فت يك خط مستقيم مماس دائرۀ مذكور كشيده شده است پس دريافت كنيد\nكه طول خط مماس چقدر می باشد.\n(۳۳) يك درخت ۸۱ فت بلند ايستاده بود بذريعة زور باد درخت\nمذكور از يك جای شكست و سر درخت مذكور بالای زمين از بيخ\nدرخت بفاصله ۹ فت پايان افتاد پس دريافت كنيد كه درخت\nمذكور از كدام جای شكست.\n(۳۴) در يك تالاب گل نيلوفر از سطح آب يك فت بلند ايستاده بود\nز زور باد خم شده بفاصلۀ ۴ فت با سطح آب يكجا شده است دريافت كنيد\nكه عمق تالاب مذكور چقدر خواهد بود.\n(۳۵) در ميان سه قصبه ها كه از يكديگر خود بفاصلۀ ۲۰ ميل واقع اند\nيك سرك ها ساخته شده اند معلوم كنيد كه از وسط نقطۀ يك سرك\nبا قصبه كه بمقابل سرك مذكور است بچقدر فاصله خواهد بود.\n(۳۶) ارتفاع مثلث متساوی الساقين را معلوم كنيد كه يك ضلع","chars":686,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00072.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/72","canvas":"https://afghanpress.org/iiif/adl0131/canvas/72","source":"https://afghanistandl.nyu.edu/books/adl0131/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0131_download.pdf","rights":{"image":{"statement":"Public domain. NYU states: \"All works presented on this website are, unless otherwise indicated, in the public domain. The images available on this website may be freely reproduced, distributed and transmitted by anyone for any purpose, commercial or non-commercial.\"","uri":"http://rightsstatements.org/vocab/NoC-US/1.0/","holder":"New York University Libraries","source":"https://afghanistandl.nyu.edu/about.html","delivery":"Images are served from a copy mirrored by this project, not from NYU's servers, under the reproduction terms above.","endorsement":"This is an independent project. It is not affiliated with, endorsed by, or reviewed by New York University."},"text":{"statement":"Machine-generated transcription, dedicated to the public domain under CC0 1.0. No warranty of accuracy: see the provenance block on every page.","uri":"https://creativecommons.org/publicdomain/zero/1.0/","holder":"Steps Ventures"}},"provenance":{"text_produced_by":"gemini-3.1-pro-preview","thinking_level":"low","read_completed":"2026-08-09","per_page_confidence":null,"per_page_confidence_note":"Not recorded during the corpus run. No calibrated per-page score exists, and none is estimated here.","human_reviewed":false,"accuracy_context":"Roughly two thirds of characters agree with a modern printed edition of the same text. Much of the disagreement is editorial, not misreading. Treat the transcription as a finding aid and read the page image before quoting.","primary_source":"The page image. The text is an index into it."}}