Question

Find the missing angle.
40°
80°
X

What is the missing angle?

Answer 1

Answer:

60°

Step-by-step explanation:

Sum of angles of triangle = 180°

x + 40 + 80 = 180

      x + 120 = 180     {Subtract 80 from both sides}

                x = 180 - 120

                x = 60°

Answer 2

Answer:

$\boxed{\sf x=60^o}$

Step-by-step explanation:

By applying the sum property.

$\sf 40+80+x=180^o$

Add the numbers:- 40 + 80 = 120

• $\sf x+120=180$

Subtract 120 from both sides:-

• $\sf x+120-120=180-120$

• $\sf x=60$