Changes

The theorems that involve chords of a circle are :

The theorems that involve chords of a circle are :

* Perpendicular bisector of a chord passes through the center of a circle.

* Perpendicular bisector of a chord passes through the centre of a circle.

* Congruent chords are equidistant from the center of a circle.

* Congruent chords are equidistant from the centre of a circle.

* If two chords in a circle are congruent, then their intercepted arcs are congruent.

* If two chords in a circle are congruent, then their intercepted arcs are congruent.

* If two chords in a circle are congruent, then they determine two central angles that are congruent.   

* If two chords in a circle are congruent, then they determine two central angles that are congruent.   

====== [[Chord length and distance for centre of the circle]] ======

====== [[Chord length and distance for centre of the circle]] ======

For a chord the distance from the center is the   perpendicular distance of the chord such that it passes through the center.

For a chord the distance from the centre is the perpendicular distance of the chord such that it passes through the centre.

====== [[The longest chord passes through the centre of the circle]] ======

====== [[The longest chord passes through the centre of the circle]] ======

Investigating the diameter is the longest chord of a circle.

Investigating the diameter is the longest chord of a circle.

====== [[Perpendicular bisector of a chord passes through the center of a circle]] ======

====== [[Perpendicular bisector of a chord passes through the center of a circle|Perpendicular bisector of a chord passes through the centre of a circle]] ======

Since every perpendicular bisector passes through the centre, the centre must lie on every one of them, so the centre must be their single common point.

Since every perpendicular bisector passes through the centre, the centre must lie on every one of them, so the centre must be their single common point.

====== [[Congruent chords are equidistant from the centre of a circle|Congruent chords are equidistant from the center of a circle]] ======

====== [[Congruent chords are equidistant from the centre of a circle|Congruent chords are equidistant from the centre of a circle]] ======

In the same circle or in circles of equal radius:

In the same circle or in circles of equal radius:

##Cone Construction http://karnatakaeducation.org.in/KOER/Maths/conesurfacearea.html

##Cone Construction http://karnatakaeducation.org.in/KOER/Maths/conesurfacearea.html

##Download ggb file here http://karnatakaeducation.org.in/KOER/Maths/conesurfacearea.ggb

##Download ggb file here http://karnatakaeducation.org.in/KOER/Maths/conesurfacearea.ggb

====== Solved problems/ key questions (earlier was hints for problems). ======

====== Solved problems/ key questions (earlier was hints for problems). ======

 

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===Projects (can include math lab/ science lab/ language lab) ===