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Mathematics 18 Online
OpenStudy (anonymous):

somebody can check out if my answers are correct or not, please

OpenStudy (anonymous):

OpenStudy (calculusxy):

go math right?

OpenStudy (calculusxy):

check number 7.

OpenStudy (calculusxy):

isn't there a right angle there?

OpenStudy (anonymous):

ok #7 is a right angle

OpenStudy (anonymous):

the others are correct or not

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