Question

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Answer 1

Answer: 80 degrees because a line is 180°.

So if you subtract

180 - 100 = 80°

Answer 2

Answer:

x=80°

Step-by-step explanation:

The measures of angle x and the 100° angle form a straight angle.

This straight angle is 180°.

You can subtract the measure of one angle from the whole to find the measure of the other angle.

180°-100°=80°

This means angle x is 80°.