- A72°
- B108°
- C60°
- D36°
Step-by-Step Solution
The triangle is isosceles, so angle B = angle C = (180° − 36°)/2 = 72°. The bisector gives angle DBC = 36°. In triangle BDC, angle BDC = 180° − 36° − 72° = 72°.
Answer: A) 72°
In triangle ABC, AB = AC and angle A = 36°. The bisector of angle B meets AC at D. What is the measure of angle BDC?
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