{"book":"adl0131","page":48,"text":"کتاب ٣٧ مساحت\n\nهر دو سرهای پرکار ٢٥٫٥ انچه خواهد بود اگر خط الف ب بجای یک انچه\nده انچه فهمیده شود پس فاصله که بالا معلوم کرده شد است ٢٥٥\nانچه خواهد بود و اگر الف ب به انچه تعبیر کرده شود پس همان فاصله ٢٫٥\nانچه خواهد شد. فرض کنید که معلوم کردن طول خط مستقیم مفروضه\nرا مطلوب داریم پس برای این مطلب پرکار را کشیده سرهای او را بهر دو\nسرهای خط مفروضه بمانید - بعد ازین یک سر پرکار را بر خطوط ب و ج\nو د و وغیره و سر دوم را بر خطوط قطری بمانید و پرکار را انقدر شور داده\nبروید که هر دو سر پرکار به انچنین دو سرهای خط مستقیم بیاید که از متواز\nخطوط خط الف د باشد پس اینطور طول خط مفروض معلوم خواهد\nمثلاً فرض کنید که یک سر پرکار بر خط ج ج است و سر دوم بر آن قطری\nخط که از هندسه ٩ کشیده شده است و هر دو سر پرکار بران خط مستقیم\nاست که پنجم حصه متوازی الف ب است پس اینطول ٩٥٫٥ انچند خط\nالف ب خواهد بود.","chars":788,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00048.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/48","canvas":"https://afghanpress.org/iiif/adl0131/canvas/48","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."}}