Theaetetus
   Part
 1 Text |    figures and called square or equilateral numbers;—that was one class.~
 2 Text |      have for their squares the equilateral plane numbers, were called


Timaeus
   Part
 3 Intro|      which forms the half of an equilateral triangle. Let us then choose
 4 Intro|    solids are formed—first, the equilateral pyramid or tetrahedron;
 5 Intro|    scalene, which is half of an equilateral triangle. By the combination
 6 Intro|        sides are formed by four equilateral or twenty-four scalene triangles.
 7 Intro| triangles, which unite as eight equilateral triangles, and make one
 8 Intro|        having twenty triangular equilateral bases, and therefore 120
 9 Text |         third triangle which is equilateral; the reason of this would
10 Text |     point as a centre, a single equilateral triangle is formed out of
11 Text |         six triangles; and four equilateral triangles, if put together,
12 Text | triangles, which unite as eight equilateral triangles and form one solid
13 Text |     them included in five plane equilateral triangles, having altogether
14 Text |      bases, each of which is an equilateral triangle. The one element (
15 Text |         centre, and forming one equilateral quadrangle. Six of these
16 Text |   having six plane quadrangular equilateral bases. There was yet a fifth
17 Text |        out of either, the plane equilateral quadrangle has necessarily
18 Text |      more stable basis than the equilateral triangle, both in the whole