For numbers 16-20. Use the figure on the side to prove the congruence of the triangles. Given: $\angle B \cong \angle C$ $\overline{BE} \cong \overline{CE}$ Statement Reason $\angle B \cong \angle C$ Given Given Therefore:
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PROOF In Exercises 19 and 20 , prove that the triangles are congruent using the AAS Congruence Theorem (Theorem 5.11 ). (See Example 3 .) Given $\quad \overline{\mathrm{VW}} \cong \overline{\mathrm{UW}}, \angle \mathrm{X} \cong \angle \mathrm{Z}$ Prove $\triangle \mathrm{XWVV} \cong \Delta \mathrm{ZWU}$
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PROOF In Exercises 19 and 20 , prove that the triangles are congruent using the AAS Congruence Theorem (Theorem 5.11 ). (See Example 3 .) Given $\quad \angle \mathrm{NKM} \cong \angle \mathrm{LMK}, \angle \mathrm{L} \cong \angle \mathrm{N}$ Prove $\quad \Delta \mathrm{NMK} \cong \Delta \mathrm{LKM}$}$
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