{"book":"adl0946","page":66,"text":"۵۹\nثابت است و تغییر نمیکند و نوک مداد یک دائره ترسیم مینماید\nکه مرکزش در نقطه ه و شعاعش ه ا است بدین طریق یک پرکار\nخیلی ساده ساخته ایم.\nهر نقطه دیگر از مقوا را بگیریم آنهم یک دائره ترسیم مینماید.\nچون قطعه مقوا سطح متحرکی است که بدور نقطه ه میگردد\nپس ازین رو بخاصیت اصلی حرکت دورانی می رسیم و آن\nازین قرار است :\nدر حرکت دورانی بدور يك نقطه ثابت تمام\nنقاط سطح متحرّك دوائری ترسیم می نمایند که\nمرکزشان آن نقطه ثابت است.\n۷۹ - مرکز دوران - نقطه ثابت ه را که سطح ما بدور آن\nگشته و نیز مرکز تمام دوائر مرسومه است مرکز دوران می\nنامند -\n۸۰ - تعریف - دوائری که دارای یک مرکز باشند\nآنها را متحد المرکز می نامند در ش ۶۶ سه دائره متحد المرکز","chars":628,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00066.jpg","first_page":1,"last_page":327,"title":"Handasah-ʼi musaṭṭaḥah barā-yi ṣinf-i haftum-i makātib-i rushdīyah, bi-qarār-i prūghram-i Vizārat-i Jalīlah-ʼi Muʻārif-i Afghānistān هندسۀ مسطحه :هندسۀ مسطحه","permalink":"https://afghanpress.org/book/adl0946/66","canvas":"https://afghanpress.org/iiif/adl0946/canvas/66","source":"https://afghanistandl.nyu.edu/books/adl0946/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0946_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."}}