Respuesta :

Hrishii

Answer:

b) 40

Step-by-step explanation:

By angle sum property of a triangle:

[tex] x°+20°+120°=180°\\

x°+140°=180°\\

x°=180°-140°\\

x° = 40°\\

\huge \red {\boxed {\therefore x = 40}} [/tex]

Kelemele

Answer:

B)40°

Step-by-step explanation:

Sum of angles in a triangle =180°

120°+20°+x°=180°

140°+×°=180

Collect like terms

x°=180°-140°

x°=40°