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OpenStudy (anonymous):
In △DEF, what is the length of DF?
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OpenStudy (anonymous):
OpenStudy (anonymous):
Answer choices: 126 \[63\sqrt{2}\] \[42\sqrt{3}\] \[21\sqrt{3}\]
OpenStudy (xanthe):
Check again:D
OpenStudy (anonymous):
The 4th answer?
OpenStudy (xanthe):
Let me see your working..^^
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OpenStudy (xanthe):
A hint: Use sin
OpenStudy (anonymous):
When I used sin I got 54.559, which isn't an option.
OpenStudy (xanthe):
Solve! |dw:1368886435515:dw|
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