a chord of a circle of radius 10 cm subtends a right angle at its centre. the length of the chord in cm is
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r = 10 cm given.
length of chord = c
c² =r² + r²
c = √100 +100
c = 10√2 cm.
length of chord = c
c² =r² + r²
c = √100 +100
c = 10√2 cm.
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