ellipse compass

line font diagram drawing brand cartoon circle text logo wheel sketch artwork wing number presentation ellipse compass vector isolated white ellipse compass drawing axis center central symmetry circumference closed type conic constant curve line diagonal diameter dimensions directrix draftsmanship eccentricity education engineering equation focal distance points focus positions form formula geometric center geometry height hyperbola infinite elongation intersection invariant machinery major mathematics minor orbit planet parabola perimeter physics polar radius curvature ratio semi-axis width