Chapter 1.2, Problem 10E

Suppose that $\stackrel{\rightharpoonup }{AB},\stackrel{\rightharpoonup }{AC},\stackrel{\rightharpoonup }{AD},\stackrel{\rightharpoonup }{AE},$ and $\stackrel{\rightharpoonup }{AF}$ are coplanar,

Exercises $10-13$

Classify the following as true or false:

a) $\text{m}\angle BAC+\text{m}\angle CAD=\text{m}\angle BAD$

b) $\angle BAC\cong \angle CAD$

c) $\text{m}\angle BAE-\text{m}\angle DAE=\text{m}\angle BAC$

d) $\angle BAC$ and $\angle DAE$ are adjacent

e) $\text{m}\angle BAC+\text{m}\angle CAD+\text{m}\angle DAE=\text{m}\angle BAE$