AB is a chord of a circle of radius 5 inches and is tangent to another circle of radius 3
inches. If the two circles are concentric, then what is the length of the chord AB
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Answer:
8cm
Step-by-step explanation:
Let 'AB' is the cohrd of biggest circle and 'O' be the centre of a circle
∴In△ODA
OA2=OD2+AD2
(5)2=(3)2+AD2
AD2=25−9
AD2=16
AD=4cm
∴AB=2×AD
=2×4
AB=8cm
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