# Obtuse angles

• Mar 16th 2011, 05:15 AM
julieta
Obtuse angles
Hello!

Im stuck at this question (Worried)

How many obtuse angles can there be in an obtuse triangles??

• Mar 16th 2011, 05:42 AM
bjhopper
Sum of angles in triangle =? If one angle is obtuse say 95 degrees what can you say about the other two ?

bjh
• Mar 16th 2011, 06:48 AM
Soroban
Hello, julieta!

Did you make a sketch?

Quote:

How many obtuse angles can there be in an obtuse triangle?

Suppose there could be two obtuse angles in a triangle.

The "triangle" might look like this:

Code:

```    \                      /       \                    /       \                  /         \                /         \ 92o      95o /           *-------------*```

Then where is the triangle?

• Mar 16th 2011, 07:00 AM
julieta
OH okay!!

So if one angle is bigger than 90 degrees than there will not be any bigger angles in the triangle?! I got it!

Thanx soooo much! you really helped med out (Rock)
• Mar 16th 2011, 08:38 AM
HallsofIvy
Specifically, the sum of angles in any triangle is 180 degrees. If one angle is larger that 90 degrees, that leaves less than 90 degrees for the sum of the other two.