PROVING A THEOREM In Exercises 7-9, write a two-column proof for the property. (See Example 3.) 7. Reflexive Property of Segment Congruence 8. Transitive Property of Angle Congruence 9. Transitive Property of Segment Congruence​

PROVING A THEOREM In Exercises 79 write a twocolumn proof for the property See Example 3 7 Reflexive Property of Segment Congruence 8 Transitive Property of Ang class=

Respuesta :

The two-column proof are properties written with reason statements.

How to write two column proofs ?

Two column proof is always written in two columns. This proof is consist of two parts, first one is the statement part which contain the exact statement of theorem and second part is reason part which consist of reason for that particular statement or equation. Both the parts are written in different columns, thus the proof is called as two-column proof.

In the given question , two-column proofs are as below :

for part 7 - Reflexive Property of Segment Congruence

To prove:  (AB)' ≅ (AB)'

Proof :

            Statements                               Reasons

           segment AB                                Given

           AB = |(AB)'|                                   Definition of segment length

           (AB)' = (AB)'                                  Reflexive property

           (AB)' ≅ (AB)'                                 Definition of congruent segments

for part 8 - Transitive Property of Angle Congruence

To prove: ∠A ≅ ∠C

Proof :

            Statements                               Reasons

           ∠A ≅ ∠B                                      Given

           ∠B ≅ ∠C                                      Given

            m∠A = m∠B                                Definition of congruent angle

            m∠B = m∠C                                Definition of congruent angle

            m∠A = m∠C                                Definition of Transitive property

            ∠A ≅ ∠C                                     Congruence property

for part 9 - Transitive Property of Segment Congruence

To prove: ∠A ≅ ∠C

Proof :

            Statements                               Reasons

           ∠A ≅ ∠B                                      Given

           ∠B ≅ ∠C                                      Given

            ∠A ≅ ∠C                                     Transitive Congruence property

To know more about Congruence properties, visit:

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