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Question

Find the radius of the circle whose centre is (3,2) and passes through (5,6).

A
45
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B
25
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C
42
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D
None of these
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Solution

The correct option is A 45
Radius of the circle whose centre is (3,2) and passes through (5,6) is the distance between (3,2) and (5,6)

=(x2x1)2+(y2y1)2

=(53)2+(62)2

=(8)2+(4)2

=64+16

=80

=45 Units.

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