- Elementary GeometryTriangle Inscribed in a CircleInscribe a circle in a triangle.Circle Through Three PointsMedians and the CentroidDivide a circle into three equal sectors.A quadrilateral inscribed in a circleThe Diagonals of TrapezoidTangents from point to circleThe altitude of a right angle (and its children)Draw the sine squared of an angleThe Secant TheoremPappus' TheoremPole and Polar 1Inscribe a chord in a given arc of a circleHeron's Formula, Geometric ProofThe Locus of Points Equidistant from Two CirclesArchimedes' Formula for π (pi)Angle Bisector, ratio of sidesDraw Length SquaredSimilarity pointsCentroid of a polygonCentroid of a triangleI am a rhombusRhombus & Circle, 2
Elementary Geometry
- Author:
- Ryan Hirst
Theorems from plane geometry.
Euclid's Elements are here: http://www.geogebratube.org/collection/show/id/2554