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Similar Triangles
Author:
Lee Ka Hei
The similar triangles ABC and ADE were created by selecting a point on side AB and constructing a line parallel to BC.
GeoGebra
Drag any vertex of triangle ABC to change the triangle or drag D to change the size of triangle ADE.
New Resources
Poorly Drawn Parallelograms 2
Droste effect draft
Average Rate of Change: Graph a Function (2)
Exploring the Derivative of an Exponential Function
Exploring Simple Loci 探究簡單軌跡
Discover Resources
Angle in a semi-circle
H - Angle Sum of a Triangle
archsinx+archcosx
arc 3
cylinder with double hemisphere
Discover Topics
Scatter Plot
Polynomial Functions
Secant Line or Secant
Isosceles Triangles
Parallelogram