CBSE Class 9 Answered
Find the length of the chord which is at a distance of 4 cm from the center of a circle whose radius is 5 cm.
Asked by Topperlearning User | 18 Aug, 2017, 08:58: AM
Expert Answer
Since ODA is a right angled triangle
By Pythagoras Theorem
(OA)2= (OD)2 + (AD)2
(5)2 = (4)2 + (AD)2
25 - 16= (AD)2
AD2 = 9
AD = 3 cm
Chord AB = 2 AD[ from the center on a chord bisects the chord]
= 2 3 = 6 cm
Answered by | 18 Aug, 2017, 10:58: AM
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