Question

If 2 angles of triangle is 50° and 80° then third angle will be 
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Answer 1

Answer:

let us assume third angles is x

50+80+x=180(sum of all angles of triangle is 180degree)

130+x=180

x=180-130

x=50°

Answer 2

★Answer★

We know sum of angle of triangle is 180.

Therefore, Let the third angle be x.

$x+50°+80° =180°\\ x+ 130° = 180° \\ x = 180° - 130° \\ \fbox {x = 50°}$