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Reflexive Property
See It in Action
Two examples of the idea done right—and one common look-alike that is not right.
EXAMPLE
EXAMPLE
NON-EXAMPLE
Definition
Reflexive Property: The reflexive property states that any geometric figure (or number) is congruent or equal to itself.
Key points:
In algebra: a=a for any real number a.
In geometry: Any segment is congruent to itself AB ≅ AB, and any angle is congruent to itself ∠A ≅ ∠A.
Often used in proofs when two triangles share a side or an angle.
Proof Example
Given DC ≅ BA, CB ≅ AD
Prove △DCB ≅ △BAD
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