Patterns in Space

an² angle ank³ arcs b₂ base circle BEARD bent-up rods blister and lining blister sphere bridge C₁ circle of radius circle turn circles centered Construction core icosahedron cover sphere cube curve decagon diagonals form diameter diamonds dimensions Draw edges Elevation Ellipse equal f₂ Fibonacci Quarterly Fibonacci series Figure FIVE REGULAR SOLIDS foci formula given square GOLDEN RECTANGLE golden section Governors Island hexaflexagon hexagonal star honeycomb dodecahedron hyperbola icosahedron inscribed insigne interior lines intersection length lining spheres LOGARITHMIC SPIRAL Major Axis midpoints octahedron outer P20 faces parabola Paste pattern perimeter perpendicular Plan plane PLATO'S FIVE REGULAR Platonic solid powers PRIMITIVE RIGHT TRIANGLES pyramid R₁ Radii lengthen ratio RECREATIONAL MATHEMATICS regular polygon Reverse creases rhombic dodecahedron shear triangle Solid Star stirrup tangent circles tessellation tetrahedron triangle corners triangles of pattern triangular faces unit vertices width 지혜