Question

if two angles of a triangle are 60 and 70 degree find 3rd angle

Answer 1

Sum of angles in a triangle=180 degree
Let the 3rd angle be x.
⇒x+60+70=180
⇒x=180-130=50
Ans:The 3rd angle is of 50 degree.

Answer 2

let 3rd angle be x
x + 60 + 70 = 180
x + 130 = 180
x = 180 - 130 = 50°