If radii of two concentric circles are 4 cm and 5 cm, then find the lenghtof the chord of bigger circle which tangent to other circle.
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Step-by-step explanation:
The length of bigger chord = length of diametre(d)
But,radius(r) of bigger circle is 5 cm
d=2×r
d=2×5
d=10 cm
The length oc chord is 10 cm
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