Give Your Child a Head Start In High School Geometry

Discoveries In Mathematics is home to exciting video presentations that explain high school geometry in a more visual way. Our authors, longtime educators Paul Cinco and Gene Eyshinskiy, break down complex concepts, such as postulates, into easy-to-understand language and dynamic images.


Exploration and Discoveries in Plain Geometry
Explorations and Discoveries in Plain Geometry Chapter 1
Explorations and Discoveries in Plain Geometry Chapter 2
Explorations and Discoveries in Plain Geometry Chapter 3

Exploration and Discoveries in Mathematics, Plane Geometry, Video Presentations Explorations and Discoveries in Mathematics

Our video presentations are organized in eleven chapters, all of which address the entire scope and sequence of the tenth grade high school geometry course, including all Euclidian proofs and proofs for geometric constructions taught in most schools. Each video presentation provides a visual understanding of a specific concept and review solutions to some related problems.


  • Lines, Segments, and Angles
  • Angles and Triangles Congruent
  • Perpendicular and Parallel Lines
  • Angle Sums and More Congruencies
  • Quadrilaterals and Polygons
  • Perimeter and Area of Polygons

  • Geometry Of the Circle and Area Of the Circle
  • Similarity
  • Pythagorean Theorem
  • Special Right Triangles and Trigonometry Of the Right Triangle
  • Coordinate Geometry (Slopes, Lines, Proofs, Areas)
  • Locus and Locus In Coordinate Geometry
  • Transformations In Coordinate Geometry
  • Geometric Constructions
Explorations and Discoveries in Plain Geometry Chapter 4
Explorations and Discoveries in Plain Geometry Chapter 5
Explorations and Discoveries in Plain Geometry Chapter 6
Explorations and Discoveries in Plain Geometry Chapter 7
Explorations and Discoveries in Plain Geometry Chapter 8
Explorations and Discoveries in Plain Geometry Chapter 9
Explorations and Discoveries in Plain Geometry Chapter 10
Explorations and Discoveries in Plain Geometry Chapter 11