{"book":"adl0131","page":171,"text":"مساحت ۱۶۰ کتاب\n\n(۴) اضلاع یک مثلث معلومند بران که دایره ساخته شود قطر آن\nمعلوم کنید.\nآن تحقیقاتیکه درینجا مینویسیم آن برای طالبانه صرف ازین سبب\nمفید است که ازان نتیجه نهایت اعلی حاصل میشود بلکه ازان هم معلوم\nمیشود که تصدیق و توضیح مسئله هندسیه\nبچه قسم میشود- فرض کنید که ا ب ج\nمثلث است و ای قطر آن دایره است که بر مثلث ساخته شده\nو از ا د و آ بر قاعده ب ج واقع شده است\nد ا ج ی\nپس بموجب دفعه (۳۳) زاویه ا ج ی قائمه است لهذا این زاویه\nبرابر زاویه ا د ب است و موافق دفعه (۳۲) زاویه ای ج برابر\nزاویه ا ب د است\nازین سبب از روی دفعه (۲۳) زاویه ی ا ج ضرور برابر\nزاویه","chars":559,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00171.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/171","canvas":"https://afghanpress.org/iiif/adl0131/canvas/171","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."}}