Question

if ∠1 ≅ ∠2 and ∠2 ≅ ∠3, then ∠1 ≅ ∠3. which property was used?
transitive property
angle addition postulate
symmetric property
reflexive property

Explanation:

The transitive property states that if a = b and b = c, then a = c. Here, for angles, since ∠1≅∠2 and ∠2≅∠3 leading to ∠1≅∠3, it follows the transitive property. The angle - addition postulate is about combining adjacent angles, the symmetric property is about reversing equality (a = b implies b = a), and the reflexive property is about an element being equal to itself (a = a).

Answer:

A. Transitive Property