for Gardeners, &c* 7 



§ 5. Superficial Figures take their particular Nami^s 



From the Number of Sides whereof they are composed; the 

 firft whereof (1 mean Triangles) are diftinguifh'd by the 

 Quality of their Angles, and by the Difpofition of their 

 Sides, ' V 



^ A. A rc£^angled Triangle, has one right Angle^ Fig. t. 



B. A Triangle Amblygon, has one obtufe Angle, Fig. 2. 



C. A Triangle O<aagon,has three lliarp Angles, Fig. 3. 



. ■ (^ 

 And is alfo in RefpeEi of the Lines, caWd^ 



C. A Triangle equilateral,as is the fame, Fig. 3J 



E. A Triangle Ifofcele,or equicrural,has two Sides equal 

 only, as Fig. 4. 



F. A Triangle Scalepous, has all his Sides unequal, Vid* 



Of Tetragonal or fquare Figures^ 



G. A right Square is composed of four equal Sides, and 

 four right Angles, Fig. 6. 



H. A re£langled long Superficies, or long Square, has 

 right Angles and equal Sides, Fig. 7. 



]. A Parrellogram has parallel Sides, but is not always 

 reclangled^ and both thefe laft Figures are calFd Parrello- 

 grams, Yi^. 8. 



K. A Rhombus, or Lozenge, is a fquare Figure which 

 has four Sides equal, but not the four Angles, Fig. p. 



L. A Rhomboid has its Sides parallel, withbut being jb- 

 quiangular or equilateral. Fig. 10. 



M. A Trapeze, or Trapezium, is neither parallel, equi- 

 angular, nor equilateral, Vid, Fig. n. 



Of thejeveral Kinds of regular Polygonal Figures, 

 N. A Pentagon, or Figure of five Sides, Fig. 1 2. 

 O. An Hexagon, or Figure of fix Sides, Fig. 15. 

 P. An Heptagon, or Figure of feven Sides, Fig. 14. 

 Q. An O£lagon, or Figure of eight Sides, Fig. 15, 

 R. Enneagon, or Figure of nine Sides, Fig. 16. 

 S. A Decagon, or Figure of ten Sides, Fig. 17. 

 T. An Endecagon, orFigure of 11 Sides, Fig. 18. 

 U, A Dodecagon, or Figure of 1 2 Sides, Fig. ip. 



B4 



