Author:Атанас Илчев

New Resources

• Reflection = 180° Rotation about a Line
• Equation of Locus - Parabola
• Pitfalls of Disk/Washer Method
• Shells
• Reflection Across 2 Parallel Lines

Discover Resources

• Finding the Co-ordinates of a Point
• Incenter Circumcenter
• Folding Test: investigating lines of reflection symmetry
• Angle sum in a triangle
• Involute of the Circle

Discover Topics

• Combinatorics
• Linear Regression
• Ellipse
• Geometric Mean
• Incircle or Inscribed Circle