Geometry

Stephanie Wagner, Jan 11, 2018


  • 1. Circumference of Circles (New)
  • 2. Proportions in similar triangles
  • 3. Triangle Inequality Exploration
  • 4. Triangle Inequality

1.

Circumference of Circles (New)

Drag the green point to appropriate position to measure the diameter of the circle. What is its diameter?[br][br]Drag the red point P to straighten the circumference. Divide the scale of the ruler to measure its length to [b]two decimal places[/b]. Use the Zoom In, Zoom Out and Move tools if necessary.[br][br]Change the diameter of the circle to 2 cm, 3cm, or any other diameters. Calculate the value of:[br]circumference ÷ diameter.[br]What do you observe?
Anthony Or. GeoGebra Institute of Hong Kong.[br]orchiming@gmail.com
– Anthony OR 柯志明

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