anyone able to answer this math problem? http://gyazo.com/c63f8dbcd12cd3217e4744e49f72ad4b

Question

anonymous · Answer

first i have to ask you, which one do you think is the right one?

anonymous · Answer

I think it's the 3rd option @Data_LG2

anonymous · Answer

hmm.. are you sure? Is AD perpendicular to BC? look at it . Is the angle between them 90°?

anonymous · Answer

nooooooo it's the first one? @Data_LG2

anonymous · Answer

lol, i have to go :)

here's my advice, try asking yourself why the choices you are choosing is right (whether they satisfy the one on the diagram) ...

so you changed your answer to the first one, i'll ask you WHY? is the angle between them already 90°?

anonymous · Answer

idk :( bye

anonymous · Answer

hey, i'll stay until you get the right answer :)

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