Q126
In an isosceles triangle ΔABC, AB = AC and ∠A = 80°. The bisector of ∠B and ∠C meet at D. The ∠BDC is equal to.
A.
90°
B.
100°
C.
130°
AnswerD.
80°
Answer: Option C
Solution
Answer: Option C
Solution:

∵ AB = AC
Point D is the incenter
∴ ∠BDC = 90° + ∠A
= 90° + × 80°
= 90° + 40°
= 130°