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OpenStudy (anonymous):
classify triangle based on side lengths 7, 15, and 21. choices are right, acute, obtuse or no tirangle
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OpenStudy (eric_d):
I think it's an acute triangle Let me show you...
OpenStudy (eric_d):
7x + 15x + 21x = 180 43x = 180
OpenStudy (eric_d):
what's x
OpenStudy (eric_d):
x=4.186
OpenStudy (eric_d):
7x = 29.3 15x = 62.79 21x = 87.9
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OpenStudy (anonymous):
49+225is less than 441 I squared each side and I thought if less than it is obtuse but I am doing it different than you
OpenStudy (eric_d):
Well
OpenStudy (eric_d):
It's a triangle
OpenStudy (bradely):
step by step answer http://www.mathskey.com/question2answer/16141/classify-triangle-based-on-side-lengths
OpenStudy (eric_d):
Maximum..= 180 degree
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OpenStudy (anonymous):
yes so is my way wrong
OpenStudy (eric_d):
yes
OpenStudy (anonymous):
ok so I need to solve for x and figure out the angles that way
OpenStudy (eric_d):
Yes
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