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Pythagorean Theorem via Shear Transformation
Author:
Brad Ballinger
Proof by shear transformation:
GeoGebra
New Resources
Pitfalls of Disk/Washer Method
Equation of Locus - Parabola
Reflection = 180° Rotation about a Line
Making New Year's resolutions for 2026
Reflection Across 2 Parallel Lines
Discover Resources
Line Demo
Finland flags
Properties of Similar Triangles
Exercise 2: Collect Organise & Summarise Data
ทฤษฎีบทพีทากอรัสโดยใช้ส่วนโค้งวงกลม
Discover Topics
Probability
Median Value
Surface
Area
Mathematics