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OpenStudy (anonymous):
Is this an acute triangle???? triangle formed with the points A(1,7) B(-2,2) and C(4,2)
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OpenStudy (anonymous):
@eliassaab ???
OpenStudy (anonymous):
https://www.wolframalpha.com/input/?i=triangle+%28%281%2C7%29+%2C%28-2%2C2%29+%2C%284%2C2%29%29
OpenStudy (anonymous):
Yes
OpenStudy (anonymous):
woah that site is awesome do you have to join it?
OpenStudy (anonymous):
do you understand proofs?
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