Tags: Circles, tangents, diagonals, n-gons, heptagon, nonagon, hendecagon, tridecagon

Tags: Proportional point, function, circle, radius, flower, puzzler, trace, ellipse, polar function

Tags: geometry, common core, conic sections, circle, ellipse, hyperbola

Tags: Archimedes, circle, ellipse, parabola, hyperbola

Tags: Circles