Radii of two concentric circles are 4 cm and 5 cm, then what is the length of the chord of larger circle which is tangent to the smaller circle?
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so , length of chord of larger circle is 6cm.
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OP^2+ PQ^2= OQ^2
4^2+PQ^2= 5^2
16 +PQ^2=25
PQ^2= 25-16
PQ^2=9
PQ=√9
PQ= 3
so the total length of tangent RQ= 6
4^2+PQ^2= 5^2
16 +PQ^2=25
PQ^2= 25-16
PQ^2=9
PQ=√9
PQ= 3
so the total length of tangent RQ= 6
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