2 Answers

Dnolan · Answer 1 · 2021-10-16T19:19:19+0000

Answer:

77

Explanation:

Let's let the unknown number be x.

Supplementary angles add up to a total of 180 degrees. Since we already know one angle is 103, this means that:

103+x=180

Subtract 103 from both sides:

$x=77\textdegree$

So, the measure of its supplementary angle is 77 degrees.

And we are done!

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