Answer:
1) Given
2) Given
3) Segment Addition Postulate
4) Segment Addition Postulate
5) Substitution Property of Equality
6) Transitive Property of Equality
7) Definition of congruent segments
Explanation:
Segment Addition Postulate
If a line segment has two endpoints, A and C, and a third point B lies somewhere on the line segment AC, the distance from A to B plus the distance from B to C is equal to the distance from A to C:
Substitution Property of Equality
If two expressions are equal to each other, then we can replace one of them with the other in any equation or expression, and the equality will still hold true
Transitive Property of Equality
If a = b and b = c, then a = c.
Statements Reasons
1) AB ≅ DE 1) Given
2) BC ≅ EF 2) Given
3) AB + BC = AC 3) Segment Addition Postulate
4) DE + EF = DF 4) Segment Addition Postulate
5) AB + BC = DF 5) Substitution Property of Equality
6) AC = DF 6) Transitive Property of Equality
7) AC ≅ DF 7) Definition of congruent segments