Obsah

1. Constructions
   1. Construct An Equilateral Triangle
   2. Copy A Line Segment With A Collapsible Compass
   3. Construct An Angle Bisector
   4. Construct A Midpoint / Perpendicular Bisector
   5. Create A Triangle From Three Given Sides
   6. Perpendicular To A Line Through A Point On The Line
   7. Perpendicular To A Line Through A Point Not On The Line
   8. Copy An Angle
   9. Make Parallel Line
   10. I. 35
   11. I. 41
   12. I. 42
   13. Book I.43
   14. I. 44
   15. Construction I. 35
   16. Construction I. 42
   17. Construction I. 44
   18. Copy of Euclid Book I 47
   19. Congruent Triangles 6
   20. SAS: Dynamic Proof!
   21. pentagon
   22. Construct Regular Pentagon Euclid IV 10
   23. Circle through 3 points IV. 5
   24. Construct perpendicular through point on line
   25. Construct perpendicular through point not on line
   26. Copy Angle
   27. Make parallel line with copy angle
   28. Line through given point parallel to given line with two perpendiculars
   29. Exterior Angle Inequality
   30. Mystery Quadrilaterals
   31. Isosceles Trapezoid
   32. Pythagorean Theorem Lesson 3
   33. Constructing square roots method 1
   34. Divide Line Segment
   35. Squaring The Rectangle
   36. Scale Pikachu
   37. Squaring A Quadrilateral
   38. Golden Rectangles and Golden Spirals
2. Proofs Before Triangles
   1. Complimentary and Supplementary Angles
   2. Complementary and Supplementary Angles
   3. Complementary and Supplementary Angles
   4. Vertical Angles Theorem: Algebra Proof
   5. Vertical Angles Theorem
   6. Vertical Angles and Linear Pairs
   7. Midpoint
   8. Angle Bisector
   9. Angle and Segment Bisectors
3. Congruent Triangles
   1. Congruent Triangles 1
   2. Congruent Triangles 2
   3. Congruent Triangles 3
   4. Congruent Triangles 4
   5. Congruent Triangles 5
   6. Congruent Triangles 6
   7. Congruent Triangles 7
   8. Kala - Exploring Congruent Triangles
   9. Congruent Triangles
   10. SSS Triangle Exploration
   11. SAS: Dynamic Proof!
   12. Animation 136
   13. Copy of Kala - Exploring Congruent Triangles
   14. Kala - Exploring Congruent Triangles SSS ASA SAS SSA
   15. SAS
   16. ASA
   17. Congruent Triangles SSS
   18. SSS
   19. SSS
4. Isosceles Triangle Properties
   1. Altitude and Median
   2. Circumcenter
   3. Graph the Line
5. Parallel Lines Cut By A Transversal
   1. Transversal Intersects Parallel Lines
6. Inequalitites
   1. Exterior Angle Inequality
   2. Triangle Side Angle Inequality
   3. Triangle Inequality
   4. Inequalities in Two Triangles-Hinge Theorem
7. Quadrilaterals
   1. Quadrilateral Classification Activity
   2. Quadrilateral Match
   3. Mystery Quadrilaterals
   4. Special Quadrilaterals
   5. Properties of parallelogram
   6. Four Parallelogram Properties
   7. Measurements In Parallelogram
   8. Isosceles Trapezoid
   9. Midsegment and proof
   10. Varignon's Theorem
8. Area
   1. Euclid I. 35
   2. Euclid I. 41
   3. Euclid Book I 47
   4. I 47 Diagram
9. Pythagorean Theorem
   1. Pythagorean Theorem Lesson I
   2. Pythagorean Theorem Lesson 2
   3. Pythagorean Theorem Lesson 3
   4. Behold with better colors
   5. Liu Hui Pythagorean Theorem
   6. Pythagorean Theorem using sliders
   7. Perigal Pythagoras With Dilations And Vectors
   8. Shear Pythagoras
   9. Proof Without Words
   10. Proof Without Words
10. Similar Triangles
    1. Midsegment Generalization
    2. Similar Right Triangles (V1)
    3. Altitude on Hypotenuse Similarity Visualization
    4. Altitude Forms Similar Triangles Animation
    5. Altitude Forms Similar Triangles Animation
    6. Side-Splitter 1
    7. Proportionality property 2
    8. Angle Bisector Theorem
    9. Organic Pythagorean Theorem With Similar Polygons
    10. Pythagoras Pikachu
    11. Scale Pikachu
11. Special Topics: Pi
    1. Archimedes Pi Diagram
    2. Angle bisector in a right triangle example
    3. Archimedes Upper Bound For Pi
    4. TRUE MEANING of π
12. Special Topics: Trisecting The Angle
    1. Archimedes Angle Trisection Method
    2. Conchoid Of Nicomedes
    3. Trisecting an angle with the Conchoid of Nicomedes
    4. Trisecting an angle with the Spiral of Archimedes
    5. Quadratrix Simple
    6. Spiral Simple
13. Special Topics: Squaring The Circle
    1. Squaring A Quadrilateral
    2. Lune
    3. lune 2
    4. Lune 3
    5. pi - Ramanujan
    6. Archimedes Spiral To Square The Circle
    7. Quadratrix
14. Special Topics: Doubling The Cube
    1. Doubling a Cube
    2. Constructing the cube root of n with intersecting parabolas
15. Special Topics: The Golden Ratio
    1. Golden Rectangle - Iterated
    2. Golden Rectangles and Golden Spirals