Respuesta :

evanwheeler
The sum of angles in the triangles is 180 degrees 12+40+X=180

52+X=180

X=180-52 = 128 degrees

X is the third angle of the triangle
whitneytr12

Answer:

The third angle is 128°.

Step-by-step explanation:

We need to remember that the sum of the 3 angles of a triangle is 180°, hence if we have 2 angles, the third angle is:

[tex] 180 = \alpha + \beta + \theta [/tex]

[tex] 180 = 12 + 40 + \theta [/tex]

[tex] \theta = 180 - 52 [/tex]

[tex] \theta = 128 [/tex]

Therefore, the third angle is 128°.

I hope it helps you!