{"book":"adl0946","page":255,"text":"۲۴۸\n\nو دج نیز با هم مساویند پس دو مثلث ه ان و ه ج و با هم\nمساوی می‌گردند و ازان چنین نتیجه می‌شود .\n\nده = ا ه و ن ه = جه\n\nپس نقطۀ ه وسط هر دو قطر است و می توانیم بگوئیم :\nقضیه - دو قط هر متوازی الاضلاع در وسط\nیکدیگر را قطع می کنند .\n۲۸۳ - مرکز متوازی الاضلاع - از روی قضیه فوق\nمی‌گوئیم چون دو نقطه ج و ن بیک فاصله اند از ه و نقطه ا\nو د نیز از آن نقطه بیک فاصله اند پس نقطۀ ه مرکز تناظر\nمتوازی الاضلاع است و می توانیم بگوئیم .\nقضیه - هر متوازی الاضلاع يك مركز تناظر قبول\nمیکند و آن نقطۀ مشترکۀ دو قطر است .\n۲۸۴ - مسئله - عکس قضیۀ فوق را تحقیق کنید .\nاگر ذواربعۃ اضلاعی دارای یک مرکز تناظره باشد برائے\nترسیم آن فقط دو راس ا و ج و مرکز تناظره کافی است زیرا که","chars":656,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00255.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/adl0946/255","canvas":"https://afghanpress.org/iiif/adl0946/canvas/255","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."}}