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anastassius [24]

3 years ago

5

Which lines, if any, must be parallel based on the given information? Justify your conclusion.

2 answers:

77julia77 [94]3 years ago

7 0

A must be parallel to b.

Proof:
∠3 = <span>∠13 (given)
</span>∠15 = <span>∠13 (vertically opposite angles are equal)
Since </span>∠13 = ∠3 and ∠13 = ∠15, ∠15 = <span>∠3

Then, a must be parallel to b (transverse line d cuts parallel lines producing converse alternate angles that are equal (ie </span>∠15 = <span>∠3))
</span>

Ivanshal [37]3 years ago

7 0

Answer:

Step-by-step explanation:

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