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how to calculate no of common tangents to two circles can you explain with an eg?

lakshita , 9 Years ago
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anser 2 Answers
ng29

Last Activity: 9 Years ago

d=r1+r2  3 common tangents                                   d is distance between centres of two circles
d>r1+r2  4 commom tangents
d
 
approve if useful
approve if useful

Nishant Vora

Last Activity: 9 Years ago

Actually there are several cases
If circles touch internally → number of common tangents = 1

If circles touch externally → number of common tangents = 3

If circles do not touch → number of common tangents = 4

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