Question

The vertices of a triangle are listed below.
L(3,6), M(10,-1), N(3,-8)

Which of the following correctly classifies the triangle?
just let me know if its obtuse or acute

Answer 1

Try plotting each point.

Answer 2

then use distance formula to find length of sides

Answer 3

then to obtain the angles, use law of cosines
\[c^{2} = a^{2}+b^{2}-2ab \cos \theta\]
where theta is angle opposite of c

Answer 4

ok thanks

Answer 5

haha or like Retract said , just plot the points, it may be obvious what type of triangle

Answer 6

I thought I show you earlier how to do this. No, wait, you told me that you already knew how to do it. @suzy4321

Answer 7

right isosceles u my tutor or what

Answer 8

http://www.wolframalpha.com/input/?i=plot%28%283%2C6%29%2C+%2810%2C-1%29%2C+%283%2C-8%29%2C%283%2C6%29