Triangle with Interior Lines and Equal Angles Marked
Pencil triangle a-bc with further triangles and dots marking equal angles
A pencil triangle, its vertices lettered a and b, c, is crossed by interior lines that subdivide it, with other triangles sketched around it. Small dots mark angles taken to be equal. Blocks of mirror-script stand above and below the figure; these are not included in the transcription, so further untranscribed text appears to be present.
On this page
Triangle a - b c and its interior lines
A triangle lettered a - b c is drawn and divided by lines running across its interior, producing further triangles within and beside it.
Equal angles marked by a dot
Certain angles of the figure are each flagged with a single dot to indicate that they are equal to one another.
Untranscribed notes above and below
Lines of mirror-writing run across the top of the sheet and again below the figure. Their wording is not given in the transcription and is not read here.