Geometry and the Liberal Arts

absolute geometry Albrecht Dürer architect architecture artist axioms axis base-circle bisect called canvas cardioid century chapter circle centre circular cone circumference co-ordinates compasses conic sections construction cube curve Desargues Theorem diameter dimensions discussion distance distinct points draw a circle Dürer ellipse envelope equal equation equilateral triangle Euclid Euclidean Figure fixed circle fixed point given gives golden ratio Greek hyperbola infinity inscribed intersect join length Leonardo da Vinci limaçon mirror moves nephroid non-Euclidean geometry objects obtain Optics original Pacioli painting parabola parallel pass perpendicular perspective drawing Pirkheimer plane Plate Plato Platonic solids point Q Postulate problem Proclus produced projective geometry proof proportions Proposition prove Pythagoras radius rectangle reflexion regular pentagon regular polygons Renaissance right angles says sides solids space sphere spiral square straight line subtended symmetry tangents theory tion triangle ABC Underweysung vanishing line vertex vertices Vitruvius