In the accompanying diagram, AEFB, AD II EC , DF || CB, mDAE = 34 and m DFE = 57. Find
m < ECB.

Answer:
1. Solve small triangle
2. 180-90-57=33
3.solve medium triangle
4. E=33
5.C=90
6.180-90-33=57
7.B=57
8. solve big triangle
9.A=34
10.F=57
11.D=90