{"book":"adl0131","page":24,"text":"کتاب ۱۳ مساحت\n\n۱۳- هریک ضلع مثلث را قاعده گفته میتوانیم- ارتفاع مثلث آن عمود\nمیباشد که از زاویه مقابل بر قاعده کشیده شود هر یک ضلع متواز\nالاضلاع را مقاعده گفته می توانیم و ارتفاع متوازی الاضلاع آن عمود است\nکه از یک نقطه ضلع مقابل بر قاعده کشیده شود\n۱۴- وتر ذو اربعه الاضلاع آن خط مستقیم میباشد که بزواویه های متقابل\nیکجا کرده شود- وتر کثیرالاضلاع آنرا گویند که خط مستقیم که به آن\nزاویه های کثیرالاضلاع که متصل یکدیگر نیستند کشیده شود.\n۱۵- دایره آن سطحی است که با یک خط که او را محیط گویند احاطه کرده شده با\nو یک نقطه در میان او این چنین باشد که از آن نقطه تا محیط هر قدر که\nخط مستقیم کشیده شوند همه با هم برابر باشند و این نقطه را\nخاص مرکز دایره میگویند- نصف قطر آن خط مستقیم است که از مرکز\nبگذرد و هر دو انجام او بر محیط باشند\nقطر دائره آن خط را گویند که از مرکز بگذرد","chars":769,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00024.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/24","canvas":"https://afghanpress.org/iiif/adl0131/canvas/24","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."}}