allery5 cm ବ୍ୟାସାର୍ଦ୍ଧ ବିଶିଷ୍ଟ ଏକ ବୃତ୍ତର କେନ୍ଦ୍ରରୁ ଏକ ବିନ୍ଦୁର ଦୂରତା 13 cm ଅଟେ। ଏହି ବିନ୍ଦୁରୁ ଅଙ୍କିତ ସ୍ପର୍ଶକର ଲମ୍ବ କେତେ?
A12 cm
B8 cm
C14 cm
D18 cm
Answer & Solution
Correct answer: A. 12 cm
ସ୍ପର୍ଶକଟି ବ୍ୟାସାର୍ଦ୍ଧ ପ୍ରତି ଲମ୍ବ ଅଟେ, ତେଣୁ ଏହାର ଲମ୍ବ ହେଉଛି 169 - 25 = 144 ର ବର୍ଗମୂଳ, ଅର୍ଥାତ୍ 12 cm।
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