DEFINITIONS. 



38^ 



29. An ohtuse-angled triangle ha* 

 one obtuse angle. 



30. An acute-angJed triangle has all its 

 three angles acute. 



31. A figure of four sides and angles is called a quad' 

 tangle^ or a quadrilateral, 



32. A parallelogram is a quadrilateral, which has both 

 pair of its opposite sides parallel. And it takes the fol- 

 lowing particular names. . 



33. A rectangle is a parallelogram, 

 having all its angles right. 



34. A square is an equilateral rectan- 

 gle, having all its sides equal, and all 

 its angles right. 



35. A rhomboid is an oblique-angled 

 parallelogram. 



LJ 



36. A 7-homhusis an equilateral rhom- 

 boid, having all its sides equal, but its 

 angles oblique. 



Ala 



37. A 



