EntityQ3518248· pop 16· linked from 25 articlesluneSign in to saveshapeConnectionsLatinEntityLeonhard EulerEntitytriangleEntityInternational Standard Book NumberEntityIbn al-HaythamEntityEuclidean geometryEntityDaniel BernoulliEntitycurveEntityOCLC, Inc.EntitydiskEntitysquaring the circleEntitycomplementEntitycrescentEntityHippocrates of ChiosEntitycompass and straightedge constructionEntityMathWorldEntityEric W. WeissteinEntitylune of HippocratesEntityGauss–Bonnet theoremEntityarbelosEntityCategoriesPiecewise-circular curves