{"book":"adl0946","page":189,"text":"۱۸۲\nاست و دیگری با آن زاویه دارای دو جهت مخالف است پس هرگاه در بیان مسئله جهت آن را نیز معلوم کنیم فقط یکی از آن دو زاویه جواب ما خواهد بود .\n۲۲۵ - مسئله - میخواهیم فاصله دو وتر مساوی از يك دائره را تا مرکز با هم مقایسه کنیم . بدواً ملاحظه می کنیم که اگر وتر از دائره ه مانند ا د مفروض باشد (رس ۱۲۳) چون نقطه ه از دو نقطه ا و د بيك فاصله است پس در روی عمود وار و بر وسط آن واقع است . پس این عمود محور تناظر وتر و دائره است و فاصله مرکز از وتر عمود ه ج است .\nحال وتر دیگری مانند اَ دَ را مساوی با ا د ملاحظه می کنیم که وسطش جَ و فاصله اش تا مرکز ه جَ است بواسطه دوران بدور نقطه ه قوس اَ دَ بر روی ا د می افتد و قوسها با وترشان بر روی یک دیگر خواهند افتاد و دو فاصله ه ج و ه جَ چون بر هم منطبق می شوند مسا ویند پس","chars":711,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00189.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/adl0946/189","canvas":"https://afghanpress.org/iiif/adl0946/canvas/189","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."}}