a ribbon which is 8/3m long is cut into pieces the length of one piece is3/3m.find the length of the other pi
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Radius of circle with centre O is OA = 8 cm
Length of chord AB = 12 cm
OC ⊥ AB which bisects AB at C
∴ AC = CB = 12 x 12 = 6 cm
In ∆OAC,
OA2 = OC2 + AC2 (Pythagoras Theorem)
⇒ (8)2 = OC2 + (6)2
⇒ 64 = OC2 + 36
OC2 = 64 – 36 = 28
∴ OC = 28−−√ = 4×7−−−−√ cm
= 2 x 2.6457 = 5.291 cm
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