posted by bleach on .
I can't figure out this problem, help would be much appreciated! Suppose line BC bisects angle ABE, and D is the interior of angle ABC. If m-angle CBD=28 degrees, and m-angle ABE=136 degrees, find m-ABD.
Since BC bisects ∢ABE , m∢ABC = 68°
so, m∢ABD = 68 - 28 = 40°