Question

If isosceles triangle ABC has a 130° angle at vertex B, which statement must be true?
(Attached file)

Answer 1

B is the answer
Choice-a). two equal angles.

-- Choice-b).
-- Choice-c). If they were each 60°, then the total
for the triangle would be (130+60+60) = 250° .

-- Choice-d). two equal angles.