Answer:
Question #4
∠1 ≅ ∠5 - Given.
∠3 ≅ ∠4 - Given.
∠4 ≅ ∠5 - Vertical angle theorem.
∠1 ≅ ∠4 - Transitive property of congruence.
t ║ v - Converse alternate interior angles theorem.
Question #5
∠5 ≅ ∠16 - Given.
∠2 ≅ ∠4 - Given.
CD ║ HG - Alternate exterior angle theorem.
∠16 ≅ ∠14 - Corresponding angle theorem.
∠14 ≅ ∠5 - Transitive property of congruence.
∠11 and ∠5 form a linear pair - Definition of linear pair.
∠11 and ∠5 are supplementary - Definition of linear pair.
∠11 and ∠14 are supplementary - Substitution property.
Question #6
l ║ m - Given.
∠4 ≅ ∠7 - Given.
AD ║ BE - Alternate interior angle theorem.
∠8 ≅ ∠10 - Corresponding angle theorem.
∠10 and ∠9 form a linear pair - Definition of linear pair.
∠10 and ∠9 are supplementary - Definition of linear pair.
∠8 and ∠9 are supplementary - Substitution property.
~Hope this helps!~