... when the first parts of the one doe agree to the first parts of the other, the meane to the meane, the extreames or ends to the ends, and lastly the parts of the one, in all respects to the parts, ... parts, of the other: so Lines are congruall or agreeable, when the bounding, points of the one, applyed to the bounding points of the other, and the whole lengths to the whole lengthes, doe ... divided into two equall parts, by the said line thus [59 ]drawne. For by drawing the raies of the equall peripheriesia. and ie. the said io. doth cut the angle aie. into two equall parts, by the 11....