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→Concept #4: Theorems and properties
====== [[Congruent circles|Congruent circles]] ======
====== [[Congruent circles|Congruent circles]] ======
====== [[Secant and tangent of a circle]] ======
==== Concept #3: Circles and Lines ====
==== Concept #3: Circles and Lines ====
==== Concept #4: Theorems and properties ====
==== Concept #4: Theorems and properties ====
A chord is a straight line joining 2 points on the circumference of a circle.Chords within a circle can be related in many ways.
The theorems that involve chords of a circle are :
* Perpendicular bisector of a chord passes through the center of a circle.
* Congruent chords are equidistant from the center 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 they determine two central angles that are congruent.
====== [[Perpendicular bisector of a chord passes through the center of a circle]] ======
====== [[Congruent chords are equidistant from the centre of a circle|Congruent chords are equidistant from the center of a circle]] ======
===== Activities =====
===== Activities =====