BC is a common tangent to circles which touch externally at P. Tangent at P meets BC at A. If BA = 2 cm, find the length of BC
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Answer:4 cm
Step-by-step explanation:
AP = BA (Tangents from same external point are equal)
Similarly
AP = CA
Given that AP =2cm
And, BA+CA=BC
SINCE AP = CA =BA
CA = BA =2 cm
BC = 2 + 2 = 4 CM
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