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solong [7]
3 years ago
14

If two angles are supplementary, they must __________.

Mathematics
2 answers:
Veronika [31]3 years ago
7 0
If two angles are supplementary, their sum is 180º and they can be expressed as x and 180-x. If they are congruent ,then the two angles are equal: 
<span>x=180-x </span>
<span>2x=180 </span>
<span>x=90º and 180-x=90º 
</span><span> The 2 angles have to add to 180 degrees</span>

WARRIOR [948]3 years ago
6 0
Supplementary angles add up to 180
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