Question

theorems of circle of class 9 chapter circle

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Answer 1

Hey mate!

Your question isn't clear, but I take it that you want all the theorems from the chapter.

Here they are:

Theorems Of the lesson, Circles:

1. Equal chords subtend equal angles at the centre of the circle.
2. If a perpendicular of a chord is drawn from the centre of a circle, it bisects the chord.
3. Equal chords of a circle are equidistant from the centre of the circle.
4. Measure of angles subtended to any point on the circumference of the circle from the same arc is equal to half of the angle subtended at the center by the same arc.
5. The opposite angles in a cyclic quadrilateral are supplementary.

These are the main theorems, although some of them do have converses that come as different theorems.

If you do want the converse(s), feel free to comment :))

Hope this is what you expected!