¶ Spherical Triangle Sequence
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Index Entry
“A triangle drawn on the earth’s surface is actually a spherical triangle bounded by great circle arcs. If the triangle is drawn large enough, it is evident that the arcs divide the surface of the sphere into two triangles enclosed by common edges. The are apparently ‘outside’ one triangle is seen to be ‘inside’ the other. Because every spherical surface has two aspects–convex if viewed from outside; concave if viewed from within–each of these triangles is, in itself, two triangles. Thus one triangle becomes four when the total complex is understood.”
¶ Citations
- SYNERGETICS ILLUSTRATIONS, caption #18. 1967
