Geometry Line, a half-line and line segment The line segment bisector Angle, measurement of angles   Construction of angles; 60°, 30°, 90° and 45° (degrees)

Points, Lines and Planes in Three-Dimensional (3D) Space Position of two lines in a three-dimensional space Line and plane in a three-dimensional space Two planes in a three-dimensional space
The line of intersection of two planes   Orthogonal projection of a point onto a plane
The distance from a point to a plane Angle between a line and a plane, and angle between two planes

 Plane Geometry – Plane Figures
Triangles  Main properties of triangles  Similarity of triangles, division of a line segment in a given ratio Right-angled Triangle - The Pythagorean Theorem The Pythagorean theorem  Solving the right triangle Equilateral triangle Isosceles triangle
Oblique or Scalene Triangle    The median, the centroid of a triangle   Congruence The sine law (or the sine rule) and the cosine law
The sine law
The sine law examples
The cosine law
The cosine law examples
Calculating angles of an oblique triangle
Solving the oblique triangle - use of the sine law and the cosine law
Triangle problems and solutions Triangle solved problems, examples
Triangle solved problems - A
Triangle solved problems - B
Triangle solved problems - C
Triangle solved problems - D
Triangle solved problems - E
Triangle solved problems - F Square  Rectangle Parallelogram Kite or deltoid  Cyclic quadrilateral Tangential quadrilateral Regular polygons   Circle and circular sector Annulus and annulus segment
Plane figures solved problems, examples Plane figures solved problems, examples
Plane figures solved problems, examples - A
Plane figures solved problems, examples - B
Plane figures solved problems, examples - C
Plane figures solved problems, examples - D    