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GeoGebra
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right triangle spiral
Author:
Arthur Lee
GeoGebra
Read more in Jay Hambidge (1919),
The Elements of Dynamic Symmetry
.
New Resources
van Aubel's Theorem
Slope Field (1)
Viviani's Window
Bottema's Theorem
Angles and Intersecting Lines: Quick Investigation
Discover Resources
Approximation of area under a curve
Similarity, By Side Ratios
Euclid Book XI Prop 9
Measurement of rotation
Egan's Sketch 9/28
Discover Topics
Similar Triangles
Logarithm
Arithmetic
Polygons
Definite Integral