Question

If two angles of a triangle is 40degree and 80 degree, then what is the measure of third angle?​

Answer 1

Answer:

60

Step-by-step explanation:

sum of all angles of a triangle is 180 so 180 - 120 is 60

Answer 2

Answer:

third angle=60°

Step-by-step explanation:

sum of all angles of a triangle=180°

Let the third angle be x

40°+80°+x=180°

120°+x=180°

x=180°-120°

x=60°