Keerthana
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In a circle of radius 2 units, a diameter AB intersects a chord of length 2 units perpendicularly at P. If AP > BP, then AP is equal to

a

(2+5)(2+\sqrt{5}) units

b

(2+3)(2+\sqrt{3}) units

c

(2+2)(2+\sqrt{2}) units

d

3 units

Answer : Option B
Explanation :

Centre of circle = O

PM = PN = 1 unit

OM = 2 units

OP=OM2MP2\therefore \mathrm{OP}=\sqrt{\mathrm{OM}^{2}-\mathrm{MP}^{2}}

=2212=41=3=\sqrt{2^{2}-1^{2}}=\sqrt{4-1}=\sqrt{3} units

AP=OA+OP=(2+3)\therefore \mathrm{AP}=\mathrm{OA}+\mathrm{OP}=(2+\sqrt{3}) units

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