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The longest chord passes through the centre of the circle (view source)
Revision as of 15:33, 3 December 2013
, 15:33, 3 December 2013→Notes for teachers
===Notes for teachers===
===Notes for teachers===
A chord is a straight line joining 2 points on the circumference of a circle. Chords within a circle can be related many ways. The theorems that involve chords of a circle are :
# A chord is a straight line joining 2 points on the circumference of a circle.
Perpendicular bisector of a chord passes through the center of a circle.
# Chords within a circle can be related in many ways.
Congruent chords are equidistant from the center of a circle.
# The theorems that involve chords of a circle are :
If two chords in a circle are congruent, then their intercepted arcs are congruent.
* Perpendicular bisector of a chord passes through the center of a circle.
If two chords in a circle are congruent, then they determine two central angles that are congruent.
* 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.
===Activity No 1[Theorem 1: Perpendicular bisector of a chord passes through the center of a circle.] ===
===Activity No 1[Theorem 1: Perpendicular bisector of a chord passes through the center of a circle.] ===