Q114
In ΔABC, AD ⊥ BC and AD2 = BD × DC. The measure of ∠BAC is :
A.
75°
B.
90°
AnswerC.
45°
D.
60°
Answer: Option B
Solution
Answer: Option B
Solution:
AD2 = BD.DC
ΔADC ∼ ΔCAB (Property of a right angle Δ)
∠BAC = ∠ADC = 90°