First like figures are defined, then are they compared one with another, similitude of figures is not onely of prime figures, and of such as are compounded of prime figures, but generally of all other whatsoever. This similitude consisteth in two things, to witt in the equality of their angles, and proportion of their shankes.
Therefore,
20. Like figures have answerable bounds subtended against their equall angles: and equall if they themselves be equall.
Or thus, They have their termes subtended to the equall angles correspondently proportionall: And equall if the figures themselves be equall; H. This is a consectary out of the former definition.
And
21. Like figures are situate alike, when the proportionall bounds doe answer one another in like situation.
The second consectary is of situation and place. And this like situation is then said to be when the upper parts of the one figure doe agree with the upper parts of the other, the lower, with the lower, and so the other differences of places. Sn.
And
22. Those figures that are like unto the same, are like betweene themselves.