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प्रश्न
In the adjoining figure, Δ ABC is circumscribing a circle. Then, the length of BC is ______
पर्याय
7 cm
8 cm
9 cm
10 cm
MCQ
रिकाम्या जागा भरा
उत्तर
In the adjoining figure, Δ ABC is circumscribing a circle. Then, the length of BC is 10 cm.
Explanation:
Since lengths of tangents from the same external point are equal.
Therefore,
BZ = BL = 4cm
Also
AZ = AM = 3cm
This gives
MC = 9 - 3 = 6 cm
Similarly LC = MC = 6cm
So length of BC = BL + LC = 4cm + 6cm = 10cm
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