Sentence Examples


  • If the faces be all equal equilateral triangles the solid is termed the "regular" tetrahedron.
  • Arrangements connected with Claus' formula are obtained by placing six tetrahedra on the six triangles formed by the diagonals of a plane hexagon.
  • If there were such a thing as a triangle contained by absolutely straight lines, its three angles would no doubt measure what Euclid says; but straight lines and true triangles nowhere exist in reruns natura.
  • The arc measured was 3° 7' 3" in length; and the work consisted of two measured bases connected by a series of triangles, one north and the other south of the equator, on the meridian of Quito.
  • Contains problems of finding rational right-angled triangles such that different functions of their parts (the sides and the area) are squares.