prove that if two chords of a circle bisect each other their point of intersection will be the centre of the circle
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Let AB and CD be two chords intersecting at point O. Join AC and BD.
Now ΔAOC≈ΔBOD
⇒AC=BD
⇒∧AC =∧ BD-----------(1)
Now,
ΔAOD≈ΔBOC
⇒AD=BC
⇒∧AD=∧BC--------(2)
(1)+(2)
⇔∧AC+∧AD =∧BD+∧BC
⇒ ANGLE "CAD"= ANGLE "CBD"
Then CD divides the circle into two equal parts thus CD is a diameter
Similarly AB is also the diameter and they both meet at point O
Thus they bisect each other....
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