If the tan=1, what does this say about a right triangle? A) One angle is obtuse
B) It's equilateral
C) It's a 30-60-90 triangle
D) It's Isosceles

If i drew it correctly, then al would also equal 14 in., because the midsegment divides the line ab into 2, equal in length lines.therefore, al = lb 

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.