10. Geometrical problem entitled “Faṣl fī burhān masqaṭ al-ḥajar fī al-muthallathāt al-ḥāddat al-zawāyā.” [Transcribed from MS. Thurston 3, f. 56v ll.vi-xxxii.]
11. Geometrical problem entitled “Masʼalah handasīyah”, beginning “Kull muthallath musāwī al-aḍlāʼ maʻlūm al-misāḥah”. [Transcribed from MS. Thurston 3, f. 55r l. xviii - f. 55v l. xvii.]