Answer:
k = -2
Step-by-step explanation:
If
Then
So
From this follows k = -2
x = 32
∠BCA = ∠DBA (90 - ∠DBC)
∠A = ∠A
ΔABD similar to ΔACB
AC/AB = AB/AD
x / 8 = 8 / 2
option (b)...........
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