87. Suppose point O point is the center of an excircle of the acute triangle △ ABC. If ∠ =° BAO 30 , what is ∠ACB ? (A) 40 ° (B) 45 ° (C) 50 ° (D) 60 ° 16

87. Suppose point O point is the center of an excircle of the acute triangle △ ABC. If ∠ =° BAO 30 , what is ∠ACB ?
(A) 40 °
(B) 45 °
(C) 50 °
(D) 60 ° 16

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統計： A(0), B(0), C(2), D(5), E(0) #2320044

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Chen Chen

B1 · 2020/05/31

#4020162

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55. In an experiment, it is found that the probability that a released bee will land on a painted target is . It is also found that when a bee lands on the target, the probability that the bee will attempt to sting the target is . In this experiment, what is the probability that a released bee will land on the target and attempt to sting it? (A) (B) (C) (D)

87. Suppose point O point is the center of an excircle of the acute triangle △ ABC. If ∠ =° BAO 30 , what is ∠ACB ?
(A) 40 °
(B) 45 °
(C) 50 °
(D) 60 ° 16

詳解 (共 1 筆)

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