An exterior angle at the base of an isosceles triangle is always Select one:
a. a right angle
b. an obtuse angle
c. an acute angle

Answer this question! 30 points and brainliest! only if you know the answer.

I'll give brainliest if you answer right : )

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?