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Two concentric circles are of radii $5$ cm and $4$ cm. Find the length of the chord of the larger circle which touches the smaller circle.
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Correct Figure (I) (1/2 Mark)
$OM \perp AB$
$AM = \sqrt{5^2-4^2} = 3$ cm (II) (1 Mark)
$AB = 2 \times 3 = 6$ cm (III) (1/2 Mark)
$OM \perp AB$
$AM = \sqrt{5^2-4^2} = 3$ cm (II) (1 Mark)
$AB = 2 \times 3 = 6$ cm (III) (1/2 Mark)