{"book":"adl0131","page":42,"text":"مساحت\n۳۱\nحساب\nبرابر وتر الف ی بسازید یکجا کنید خط الف ف پس خط الف ف متوازی\nخط ب ج خواهد شد -\n۲۵ - بر یک خط مستقیم معلوم از یک نقطه معلوم که در این خط باشد\nیک خط مستقیم که زاویه قائمه بسازد قائم کنید - فرض کنید که الف ب\nخط مستقیم معلوم است و درین ج نقطه معلوم است ف\nهر یک نقطه د را که از خط مستقیم معلوم بیرون باشد ج ب و\nمرکز تصور نموده بر نصف قطر د ج دائره بکشید که خط الف ب را بر نقطه\nی قطع کند و ی ه را یکجا کرده اینقدر خارج کنید که دائره را بر نقطه ف\nقطع کند یکجا کنید خط ف ج را پس این خط مستقیم ف ج همراه خط\nمستقیم الف ب زاویه قائمه میسازد - ف\n۲۶ - بر یک خط مستقیم معلوم از یک نقطه که ازین خط بیرون باشد\nعمود بکشید - فرض کنید که الف ب پ ی و ۱\nخط مستقیم و ج نقطه مفروض است که از خط مستقیم معلوم بیرونیست","chars":706,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00042.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/42","canvas":"https://afghanpress.org/iiif/adl0131/canvas/42","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."}}