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GeoGebraGeoGebra Classroom

Copy of Explore! Radius and Diameter

In this applet, you will explore the radius and diameter of a circle.
  • You may change the size of the radius by clicking and dragging the red button.
  • You can click and drag on any points identified in the circle to move them

In the applet below, which segment represents the radius of the circle?

In the applet below, which segment represents the diameter of the circle?

In the applet below, which point represents the center of the circle?

Click and drag point A around the circumference of the circle. Does the measure of the length of the radius ever change? Why or why not?

Click and drag point A so it sits atop point B. What is true about the relationship of the radius to the diameter?