Respuesta :

So rectangles have 90 degree angles (corners).

So if that corner is split you have to make it equal 90 degrees.
90-31=59 degrees

If you want to find angle CBA you add all the angle you know so far up.

90+59=149 degrees

Triangles have to add up to 180 degree so
180-149= 31 degrees


Answer is 31 degrees
duhitzdavie

Answer:

59

Step-by-step explanation:

A is a 90 degree angle, we can see the other side is 31

so we subtract 90-31=59