- Elementary GeometryCavalieri's PrincipleNot Vertical AnglesVertical AnglesDefinition of a CircleThe sum of the acute angles in a right triangleThe Sum of the Interior Angles of Any TriangleThe sum of the angles in Any TriangleThe Sum of the Exterior Angles of Any TriangleArea of TrianglesCongruent TrianglesParallelogramsProperties of ParallelogramsLine Symmetries and the QuadrilateralsPerimeter of a RectangleExterior Angles of PolygonsRegular Pentagon and the Golden RatioAngles in a Regular PolygonArt with Regular Polygons. Coloring.Errors in MeasurementThe midsegments divide any triangle in congruent trianglesTriangles with Equal AreaPythagorean TheoremCircumference of a Circle and PiCircumference of a CircleExplore the Area of a CircleIntersection of Circles and SpheresCopy of Volume of the CuboidThe Volume of the SpherePrismIntersection of secants in a circleMaximum Area of a Rectangle if Fixed PerimeterGlide Reflection - WalkingRotational SymmetryShearing Problem 6Shearing 7CylinderSections of CylindersNet of a CylinderNet of a ConeConic SectionsExploring Sections of Cubes

# Elementary Geometry

- Author:
- Irina Boyadzhiev

- Topic:
- Geometry

This book contains applet used for teaching geometry topics in classes for Elementary Teachers.