Dublin, Chester Beatty Library
Ar 3424
Revision of Euclid's Elements
by Athir al-Din al-Mufaddal ibn `Umar al-Abhari
figure IV.14
α
©
Σ
Dublin, Chester Beatty Library
Ar 3424
Revision of Euclid's Elements
by Athir al-Din al-Mufaddal ibn `Umar al-Abhari
figure IV.15
α
©
Σ