Google Classroom
GeoGebraGeoGebra Classroom

draw circles

Author:
Arthur Lee
Topic:
Circle
Use the freehand shape tool to draw a few circles that pass through A and B. You may move the circles carefully after drawing. Use the mid-point tool to mark centre of each circle. What do you notice about these centres?
Do the same for the vertices A and C. Can you predict the positions of the centres of circles before drawing?