Help picture below problem 14

Mathematics

1 answer:

Veseljchak [2.6K]2 years ago

5 0

Answer:

100

Step-by-step explanation:

Since l and r Parrell lines that means the measure of 4 is 80 since there vertical angles. And then 1 and 4 needs to be supplementary which means the two angles combined equals 180. so 180-80=100

so 1s angle measure is 100

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