Gyroelongated Triangular Cupola
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Johnson Solid 
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- Percolation Threshold
- Perfect Box
- Perfect Cubic
- Perfect Cuboid
- Perfect Difference Set
- Perfect Digital Invariant
- Perfect Information
- Perfect Magic Cube
- Perfect Number
- Perfect Partition
- Perfect Proportion
- Perfect Rectangle
- Perfect Ruler
- Perfect Set
- Perfect Square
- Perfect Square Dissection
- Periapsis
- Perigon
- Perimeter
- Perimeter Polynomial
- Period Doubling
- Periodic Function
- Periodic Point
- Periodic Sequence
- Period Three Theorem