Question

L is the line intersecting the two concentric circles whose commen center is O, at the point A,B,C and D. Show that AB=CD.​

Answer 1

Answer:

Let OM be perpendicular from O on line 1. we know that the perpendicular from the centre of a circle to as chord; bisects the chord. Since BC is a chord of the smaller circle and OM ⊥ BC.

AM - BM = DM - CM = AB = CD.

Answer 2

Answer:

Let OM be perpendicular from O on line 1. we know that the perpendicular from the centre of a circle to as chord; bisects the chord. Since BC is a chord of the smaller circle and OM ⊥ BC.

Step-by-step explanation:

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