Bunuel wrote:
Among all isosceles triangles RST having the measure of angle S equal to 40°, what is the largest possible measure for angle R?
(A) 40°
(B) 70°
(C) 90°
(D) 100°
(E) It cannot be determined from the information given
Since angle S is 40 degrees, angle T could also be 40 degrees, making angle R, at maximum, 100 degrees.
Answer: D
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