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NNADVOKAT [17]
2 years ago
12

In the accompanying diagram, PA is tangent to the circle at A and PC is a secant. If

Mathematics
1 answer:
Ganezh [65]2 years ago
3 0

Answer:

c. 12

Step-by-step explanation:

PA² = (BC + PB) × PB => tangent-secant theorem

PA = 8

PB = 4

BC = ?

Substitute

8² = (BC + 4) × 4

64 = 4BC + 16

64 - 16 = 4BC + 16 - 16

48 = 4BC

48/4 = 4BC/4

12 = BC

BC = 12

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