2 years ago
Last edited at 7:00AM on 1/9/2012
Ok, the sum of the 3 angles of triangle are is always 180 degree. If you have an obtuse angle (which is greater than 90 degree), then the sum of the two remaining angles will be less than 90 degree so no one of these two angles can be also an obtuse angle. Example, your obtuse angle is 100 degree, then the sum of the two remaining angles will be 180 - 100 = 80 degree <- the sum of the two angles is less than 90 degree
It is impossible for a triangle to have more than one obtuse angle because its obtuse angle is more than 900. Therefore, if we have two obtuse angles the total number of degrees will be more than 180 degrees.