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1 vote
If two angles are supplementary, they must __________.

add up to
add up to
be adjacent
be congruent

2 Answers

0 votes
The answer is 180 degrees
User Behnam Hedayat
by
7.6k points
4 votes

Answer:

angles must add up to 180°

User Adnan Khan
by
7.7k points

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