PQ and RS are two chords of a circle with centre O which intersect inside the circle at point
T. A and B are midpoints of the PQ and RS respectively. Show that O,A,T and B are
concyclic.
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Given : PQ and RS are two chords of a circle with centre O which intersect inside the circle at point T.
A and B are midpoints of the PQ and RS respectively.
To Find : Show that O,A,T and B are concyclic.
Solution:
PQ is chord and A is mid point
=> OA ⊥ PQ as perpendicular from center on chord bisect the chord
RS is chord and B is mid point
=> OB ⊥ RS as perpendicular from center on chord bisect the chord
In Quadrilateral OATB
∠A = ∠B = 90°
∠A + ∠B = 90° + 90° = 180°
as Sum of opposite angles = 180°
Hence Quadrilateral OATB is concyclic
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