Two chords PQ and PR of a circle are mutually perpendicular to each other. If the
length of the radius of the circle is r cm., let us find the length of the chord QR.
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Answer:
|QR| = 2r cms
angles subtended by a diameter are 90° and the converse is true as well so QR is a diameter
as we know 2×radius= diameter
therefore, 2r cm is the ans
just ignore the number 1 in diagram
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