The perpendicular from the centre of a circle to a chord bisects the chord.
In the figure below, the line through the centre of the circle and the chord of the circle are perpendicular. As a result, the chord is bisected by the line.

The property actually consists of three statements about a chord of a circle, the centre of the circle, and a line.
If any two of the statements are true, the remaining statement is true.
(If any one of the statements is false, one or both of the remaining statements is/are false.)
Pick one of the following statements that will be made to be true, then view what happens when one of the other statements is true or false.
Image onlyInstructions text as in global.js