Elongated Pentagonal Orthocupolarotunda
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Johnson Solid 
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- Quadrature Formulas
- Quadric
- Quadricorn
- Quadrifolium
- Quadrilateral
- Quadrillion
- Quadriplanar Coordinates
- Quadruple
- Quadruple Point
- Quadruplet
- Quadtree
- Quantic
- Quantifier
- Quantization Efficiency
- Quantum Chaos
- Quarter
- Quarter Squares Rule
- Quartet
- Quartic Curve
- Quartic Equation
- Quartic Reciprocity Theorem
- Quartic Surface
- Quartile
- Quartile Deviation
- Quartile Range