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November 28, 2014

November 28, 2014

Posted by **lacey** on Thursday, January 12, 2012 at 10:13pm.

2. A triangle has side lengths of 3, 4, and 7. what kind of triangke is it?

- geometry -
**Steve**, Friday, January 13, 2012 at 10:55amtake the two smaller sides, call them a and b. call the longest side c.

if a^2 + b2 = c^2 you have a right triangle

if < c^2 it's acute

if > c^2 it's obtuse

in addition, if you can find a,b,c such that

a=b=c it's equilateral

a=b≠c it's isosceles

a≠b≠c it's scalene

plug in your numbers and make your choice.

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