Question

given: ∠1 ≅ ∠7 prove: ℓ || m 19 know • ∠1 ≅ ∠7 from the diagram you know • ∠1 and ∠3 are vertical • ∠5 and ∠7 are vertical • ∠1 and ∠5 are corresponding • ∠3 and ∠7 are corresponding ∠1 ≅ ∠7 given ∠3 ≅ ∠1 vertical ∠s are ≅. ∠3 ≅ ∠7 transitive property of ≅ ℓ || m if corresp. ∠s are ≅, then the lines are ||. 20. conclude a proof with some unnecessary comment the given what is needed to prove that an angle is congruent to another angle

Explanation:

In a proof, the conclusion should directly state what was needed to be proven. Here, the goal was to prove \( \ell\parallel m\). The last step in a proof logically leads to the statement that was initially set out to be proved.

Answer:

What is needed to Prove