A triangle has side lengths of 34 in., 20 in., and 47 in. Classify it as acute, obtuse, or right.

Question

hero · Answer

Use law of sines and cosines to find the angles

bahrom7893 · Answer

i was thinking just draw it out or smth haha

hero · Answer

yup you could do that too using graph paper.

bahrom7893 · Answer

not like 34 in, 34 millimeters maybe.

hero · Answer

I think that might be a little difficult though especially with having no clue about the angles

bahrom7893 · Answer

It's def not right (just checked pythagorean thm)

hero · Answer

I bet @Mimi_x3 already knows the answer.

mimi_x3 · Answer

oh gawd..again..i forgot how to do this. xD

hero · Answer

lol

mimi_x3 · Answer

laughing at me? :(

hero · Answer

with you...

directrix · Answer

If the square of the longest side of a triangle is greater than the sum of the squares of the other two sides, then the triangle is obtuse.

 47^2 = 2209;  34^2 = 1156; and  20^2 = 400.


2209 > 1156 + 400

2209 > 1556   The triangle is obtuse.

hero · Answer

I knew about that rule and didn't even think of it.