Respuesta :

Answer:

59°

Step-by-step explanation:

The total sum of all the angles in a triangle is 180°.

We have the angle measures 31° and 90°.

That adds up to 121°.

To find the measure of angle k, subtract 121 from 180.

180 - 121 = 59°

k = 59°

check:

59 + 31 + 90 = 180°

:D

Have a nice day!

Answer:

b) 59

Step-by-step explanation:

All the angles should sum up to 180.

When you see a box that means it is a 90 degrees angle. So 90 + 31 = 121

So then subtract 121 from 180 to get 59

Hope this helped :)