Dialogue

 1 Intro|  the opposite sides equal (isosceles), the other with unequal
 2 Intro|    two triangles; one, the isosceles, the other, that form of
 3 Intro|  icosahedron; and from the isosceles triangle is formed the cube.
 4 Intro|   surface, and composed of isosceles triangles. To the earth
 5 Intro| triangles, the rectangular isosceles which has but one form,
 6 Intro|    the combination of four isosceles triangles into one square
 7 Timae|  of the two triangles, the isosceles has one form only; the scalene
 8 Timae| have been constructed, one isosceles, the other having the square
 9 Timae| alone is framed out of the isosceles triangle. Hence they cannot
10 Timae| generated no more; but the isosceles triangle produced the fourth