[color=#ff0000]Make your own circle that passes through the points A, B and C. [/color][br][br]Drag D to move the centre. Use the slider to change the radius r. (Type in the input bar below to specify directly a value for r.)[br][br]You may enter an equation in the yellow inout box. [br]
Where is the centre of your circle?
What is the radius of your circle?