{"book":"adl0131","page":79,"text":"کتاب ۶۸ سادس\n\nمعلوم و دریافت کرده میشود مثلاً که زاویه های نظیر مربع و مستطیل باهم\nبرابر میباشند مگر اضلاع متصل زاویه های برابر متساوی نمیباشد\nاضلاع مربع و معین نظیره متناسب میباشند مگر زاویه ها باهم\nبرابر نمیباشند\n(۷۳) اشکال متشابه مستقیة الاضلاع همیشه در برابر تعداد مثلثات\nمتشابه تقسیم کرده\nمیشوند مثلاً\nدر اشکال مخمس دفعه (۷۱) ج الف و د الف و ج الف و د الف\nکشیدن خطوط هر یک شکل در سه متشابه مثلثات تقسیم میشود\n(۷۴) در دفعه (۶۶) بیان که در نسبت متشابه مثلث ها کرده شده است\nبیان مذکور بر شکال مستقیة الاضلاع نیز صادق می آید یعنی اگر دو\nخطوط مستقیم یک شکل معلوم باشند و مشابه آن در شکل دیگ\nیک خط از نظیر کدام یک خط شکل اول معلوم باشد پس خط\nشکل دوم","chars":648,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00079.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/79","canvas":"https://afghanpress.org/iiif/adl0131/canvas/79","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."}}