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trianglemore about triangle


  3  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Triangle  \Tri"an`gle\,  n.  [L.  triangulum,  fr  triangulus 
  triangular;  tri-  (see  {Tri-})  +  angulus  angle:  cf  F. 
  triangle.  See  {Angle}  a  corner.] 
  1.  (Geom.)  A  figure  bounded  by  three  lines,  and  containing 
  three  angles. 
  Note:  A  triangle  is  either  plane,  spherical,  or  curvilinear, 
  according  as  its  sides  are  straight  lines,  or  arcs  of 
  great  circles  of  a  sphere,  or  any  curved  lines 
  whatever.  A  plane  triangle  is  designated  as  scalene, 
  isosceles,  or  equilateral,  according  as  it  has  no  two 
  sides  equal,  two  sides  equal,  or  all  sides  equal;  and 
  also  as  right-angled,  or  oblique-angled,  according  as 
  it  has  one  right  angle,  or  none;  and  oblique-angled 
  triangle  is  either  acute-angled,  or  obtuse-angled, 
  according  as  all  the  angles  are  acute,  or  one  of  them 
  obtuse.  The  terms  scalene,  isosceles,  equilateral, 
  right-angled,  acute-angled,  and  obtuse-angled,  are 
  applied  to  spherical  triangles  in  the  same  sense  as  to 
  plane  triangles. 
  2.  (Mus.)  An  instrument  of  percussion,  usually  made  of  a  rod 
  of  steel,  bent  into  the  form  of  a  triangle,  open  at  one 
  angle,  and  sounded  by  being  struck  with  a  small  metallic 
  3.  A  draughtsman's  square  in  the  form  of  a  right-angled 
  4.  (Mus.)  A  kind  of  frame  formed  of  three  poles  stuck  in  the 
  ground  and  united  at  the  top  to  which  soldiers  were  bound 
  when  undergoing  corporal  punishment,  --  now  disused. 
  5.  (Astron.) 
  a  A  small  constellation  situated  between  Aries  and 
  b  A  small  constellation  near  the  South  Pole,  containing 
  three  bright  stars. 
  {Triangle  spider}  (Zo["o]l.),  a  small  American  spider 
  ({Hyptiotes  Americanus})  of  the  family  {Ciniflonid[ae]}, 
  living  among  the  dead  branches  of  evergreen  trees.  It 
  constructs  a  triangular  web,  or  net,  usually  composed  of 
  four  radii  crossed  by  a  double  elastic  fiber.  The  spider 
  holds  the  thread  at  the  apex  of  the  web  and  stretches  it 
  tight,  but  lets  go  and  springs  the  net  when  an  insect 
  comes  in  contact  with  it 
  From  WordNet  r  1.6  [wn]: 
  n  1:  a  three-sided  polygon  [syn:  {trigon},  {trilateral}] 
  2:  any  of  various  triangular  drafting  instruments  used  to  draw 
  straight  lines  at  specified  angles 
  3:  a  percussion  instrument  consisting  of  a  metal  bar  bent  in 
  the  shape  of  an  open  triangle 
  From  U.S.  Gazetteer  (1990)  [gazetteer]: 
  Triangle,  VA  (CDP,  FIPS  79360) 
  Location:  38.54570  N,  77.31463  W 
  Population  (1990):  4740  (2195  housing  units) 
  Area:  6.9  sq  km  (land),  0.0  sq  km  (water) 
  Zip  code(s):  22172 

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