选择题
2000 AMC 8 Problem 13: Angle Bisector in an Isosceles Triangle
In triangle CAT, we have ∠ACT = ∠ATC and ∠CAT = 36°. If TR bisects ∠ATC, then ∠CRT = ?
A.
36°
B.
54°
C.
72°
D.
90°
E.
108°