Answers

2014-01-18T12:51:21+05:30
Let the 3rd side be = x
then according to the question
40 + 50 + x = 180 (sum of 3 sides of triangle is 180)
90 + x = 180
x = 180 - 90
x = 90 
so the third side is 90
if u want to check whether this is correct 
40 + 50 + 90 = 180
1 1 1
it is sides not angle.......you can't count like this for side. it can only be used when it is for angles