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Learn How: Create your own Live Web Page: Lesson 6 ⇒

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This dynamic figure was created using the latest version of the free GXWeb from Saltire Software, as shown below.

 

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Constructions of the Harmonic Mean (YouTube)

Pappus of Alexandria (1) 320 AD ⇒ Pappus of Alexandria (2) 320 AD Desargues 1639 (Projective Geometry) Trapezoid Method
If you have TI-Nspire™ for handheld, computer software or iPad App, then download the Harmony.tns document to explore these ideas further.

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