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Mathematics 7 Online
OpenStudy (anonymous):

oc is perpendicular to ab . What is the length of ab ? http://assets.openstudy.com/updates/attachments/53d265f0e4b0f2f7e5e8c3d0-lilcrunch-1406297594442-f7ec8eedfffe47dcabbabc7cae63aa54.gif

OpenStudy (anonymous):

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