geometry
posted by lacey .
1. A triangle has side lengths of 8, 10, and 12. what kind of triangle is it?
2. A triangle has side lengths of 3, 4, and 7. what kind of triangke is it?

take 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.