{"book":"adl0131","page":18,"text":"کتاب\nمساحت\n\nشایطیکه یک خط را با دیگر خط میباشد انرا زاویه مسطح می نامند\nو وقتیکه هر دو زاویه مسطحه مستقیم باشد انرا زاویه مسطحه مستقیم الخطین\nمیگویند- مثلا که بیک جاشدن دو خطوط مستقیم الف س\nو ب س و به نقطه س زاویه پیدا میشود و در این زاویه انکه و\nبیش شدن طول های آن\nخطوط هیچ فرق نمی آید چرا که د س\nو ج س نیز همان زاویه میسازند که الف س و ب س میسازد\n۵- اگر بکدام نقطه یک زاویه ساخته شود پس آنرا صرف\nبیک حرف تعبیر میکنند که بر آن نقطه نوشته میباشد چنانچه\nزاویه دفعه مثال نمبر ۴ که بالا ذکر کرده شده است صرف بحرف س\nتعبیر شده است و اگر بریک نقطه چند یک زاویه پیدا شوند پس\nهر یک زاویه بسه حروف تعبیر میشود ج-\nکه بر نقطه می زاویه میسازد و نوشته شدن","chars":642,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00018.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/18","canvas":"https://afghanpress.org/iiif/adl0131/canvas/18","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."}}