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Mathematics 9 Online
OpenStudy (autumn):

If two angles are supplementary, then they add to 180°. If two angles do not add to 180°, then they are not supplementary If two angles are not supplementary, then they do not add to 180°. Converse contrapositive Inverse ??

OpenStudy (autumn):

for wich one?

OpenStudy (autumn):

do you know the other two?

OpenStudy (mertsj):

it is the contrapositive.

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