Math B Problems?

Question

1. In triangle ABC, if an exterior angle drawn at vertex C measures 45 degrees then angle b
2.Two triangles have altitudes of equal length. If the areas of these triangles have the ratio 3:4 then the bases of these triangles have the ratio
3.

Answer 1

angle b is < 45 degrees

A1 = .5B1*h
A2 = .5 B2*h
A1/A2 = .5B1h/.5B2h = B1/B2 = 4/3

a +b+c+d = 360
b+c = 90
Thus a+d = 270