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Mathematics 13 Online
OpenStudy (anonymous):

classify triangle based on side lengths 7, 15, and 21. choices are right, acute, obtuse or no tirangle

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

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 (eric_d):

Maximum..= 180 degree

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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