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Mathematics 21 Online
OpenStudy (openstudyrocks5*):

Help ヾ(⌐■_■)ノ♪

OpenStudy (openstudyrocks5*):

@iGreen @horsegirl325

OpenStudy (igreen):

What do you think?

OpenStudy (igreen):

Perpendicular lines cross at a NINETY DEGREE ANGLE

OpenStudy (anonymous):

|dw:1426168046915:dw|

OpenStudy (openstudyrocks5*):

|dw:1426168074158:dw|

OpenStudy (igreen):

Correct!

OpenStudy (anonymous):

|dw:1426168087347:dw|

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