| This six-point perspective, with the six vertices of an octahedron serving as the vanishing points, becomes the basis of his spherical paintings. |
| The particular tablet which interests us here investigates how to calculate the radius of a circle through the vertices of an isosceles triangle. |
| Indeed, the sum is a polygon whose vertices are obtained as the sums of vertices of the addends. |
| If all the vertices of a hexagon lie on a conic, and if the opposite sides intersect, then the points of intersection lie on a line. |
| His theses drawn from cultural and analytic vertices, provide anchors for the incomprehensible. |
| But what vertices of anxiety lie behind the gentle opposition of town and country, youth and age when Janice arrives in Dulwich. |
