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OpenStudy (anonymous):
perimeter of a polygon (39)
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OpenStudy (anonymous):
|dw:1336212542268:dw|
OpenStudy (aravindg):
is the angle r90 degreee?
OpenStudy (anonymous):
the twelve one only has that symbol of 90 degrees
OpenStudy (callisto):
Isos. triangle?
OpenStudy (callisto):
lol, yes. |dw:1336212751676:dw| By Pyth Thm, \[a = \sqrt {13^2 - 12^2} = 5\]
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