2517
_Prima figura._
Angulus rectus
ABC.
22[Figure 22]
_Secunda figura._
Angulus trianguli æqui-
lateri ABD.
23[Figure 23]
_Tertia figura._
Angulus pentago-
ni æquilateri
ABD.
24[Figure 24]
_Quarta figura._
Angulus hexagoni
æquilateri
ABD.
25[Figure 25]
_Quinta figura._
Angulus ſeptanguli
æquilateri ABD.
26[Figure 26]
_Sexta figura._
Angulus æquilateri
octanguli ABD.
27[Figure 27]