Question

if one angle of a triangle is greater than the sum of the other two of the triangle is obtuse Triangle

Answer 1

Suppose the biggest angle is C and other two are A and B. Then

C = 180-(A+B)

C > A+B

C > 180 - C

C > 90

Hence it is a obtuse angle triangle.

Answer 2

let ist angle=A
2nd angle=B
3rd angle=C
we know that all angle of a triangle=180
A.T.Q
(obtuse angle mean greater than 90 and less than 180)
A=180-(B+C)