MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd
MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd
MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd
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232 Index<br />
oriented triangles 70<br />
origami 127<br />
orthic triangle 54<br />
orthocenter 39, 46<br />
Ostrowski, Alexander 173<br />
Oughtred, William 148<br />
Our Lord 18<br />
Oxford University 150<br />
Pach, J. 55<br />
Pacioli, Luca 11, 153<br />
packings v, 44<br />
Padovan sequence 70<br />
Padovan spirals 70<br />
Padovan whorl 70<br />
pagoda 6-7<br />
paper folding 127<br />
palimpsest 151<br />
Pappus’ Centroid Theorem 152<br />
Pappus’ Hexagon Theorem 152<br />
Pappus of Alexandria 13, 151-152,<br />
183<br />
Pappus’ Problem 152<br />
parallelogram properties 37<br />
Parthenon 9<br />
partition 72-73<br />
partridge<br />
number 72<br />
tiling v, 72<br />
Pascal, Blaise 58, 157, 159, 184<br />
Pascal’s Law of Pressure 159<br />
Pascal’s Mystic Hexagram Theorem<br />
159<br />
Pascal’s Triangle 58-59, 74, 159<br />
Pascal’s Wager 159<br />
Pauca sed matura 164<br />
pedal mapping 54<br />
pedal triangle 38-39, 54, 118, 127<br />
Pedersen, Jean J. 117<br />
Pedoe, Dan 31<br />
peg solitaire 169<br />
Pell, John 148<br />
Pell’s equation 157<br />
Peloponnesian War 149<br />
pengala 5<br />
pentagon 107<br />
pentagonal dipyramid 15<br />
Perelman, Grigory 170<br />
perfect<br />
coloring 67<br />
tiling 70<br />
triangulation 70<br />
periodic orbit 118-120<br />
Perplexities 181<br />
Pestalozzi, J. H. 165<br />
Peterhouse, Cambridge 168<br />
Pfaff, J. F. 164<br />
Philosophia Sacra 9<br />
Picard, Émile 166<br />
Pinchasi, R. 55<br />
ping-pong 178<br />
plaited polyhedra 117<br />
planar soap bubble clusters 52<br />
plastic<br />
number 70<br />
pentagon 70<br />
Platonic solid 11-13, 117, 150<br />
Platonic triangles 11<br />
Platonism 150<br />
Plato of Athens 11, 149, 183<br />
Plato’s Academy 149-150<br />
playscape (triangular) 195<br />
Poincaré-Bendixson Theorem 170<br />
Poincaré Conjecture 170<br />
Poincaré disk 75<br />
Poincaré group 170<br />
Poincaré, Henri 166, 170, 185<br />
Poincaré inequality 170<br />
Poincaré-Linstedt method 170<br />
Poincaré map 170<br />
Poincaré metric 170<br />
Poincaré, Raymond 170<br />
Polydeuces 83<br />
polygonal dissections 106-107