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Triangle ABC is isosceles with AB = AC and ∠BAC = 40°. BD is the perpendicular from B to AC. Find ∠DBC.

Competition practiceGeometry
  • A20°
  • B50°
  • C70°
  • D40°

Step-by-Step Solution

Base angles: ∠. In right triangle BDC, ∠DBC = .
Answer: A) 20°

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