Trilinear Polar
Given a Triangle Center 
, the line
is called the trilinear polar of
and is denoted 
.See also Chasles's Polars Theorem- Pentagonal Prism
- Pentagonal Pyramid
- Pentagonal Pyramidal Number
- Pentagonal Rotunda
- Pentagonal Tiling
- Pentagram
- Pentagrammic Antiprism
- Pentagrammic Concave Deltahedron
- Pentagrammic Crossed Antiprism
- Pentagrammic Deltahedron
- Pentagrammic Dipyramid
- Pentagrammic Prism
- Pentakaidecagon
- Pentakis Dodecahedron
- Pentalpha
- Pentangle
- Pentatope
- Pentatope Number
- Pentomino
- Percent
- Percentage Error
- Percolation Theory
- Percolation Threshold
- Perfect Box
- Perfect Cubic