{"book":"adl0131","page":242,"text":"۲۳۱\n\nالکراس که بالای خط الف ب از نقطه ج عمود که کشیده شود مستقیم\nعمود مذکور معلوم خواهد شد.\n(۱۸۴) یک خط مستقیم و یک نقطه در خط مستقیم مذکور معلوم است\nاز نقطه مذکور خط مستقیم که زاویه های قائمه ساخته کشیده شود مستقیم\nخط مستقیم مذکور را بذریعه الکراس دریافت کنید.\nفرض کنید که الف ب خط مستقیم و د نقطه معلوم اندرون خط مستقیم\nمذکور است. الکراس مذکور را بر نقطه د مستقیم قائم کنید که از خطوط\nعمودی کراس مذکور نشان یک خط عمودی متوازی خط الف ب\nباشد پس نشان خط دیگر کراس مذکور نشان خط مستقیم را ظاهر\nخواهد کرد که با خط الف ب زاویه های قائمه میسازد.\n(۱۸۵) بالای یک خط مستقیم از کدام نقطه اندرون خط مستقیم\nمذکور صرف بذریعه جریب عمود ها دریافت کرده میشود.\nفرض کنید الف ب خط مستقیم","chars":669,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00242.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/242","canvas":"https://afghanpress.org/iiif/adl0131/canvas/242","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."}}