Find the value of k°.

Solution:

The angle marked with a square is a right angle, which measures 90°. The angle k° and the adjacent angle of 11° form this right angle. Therefore, their sum is 90°.

\( k° + 11° = 90° \)

\( k° = 90° - 11° \)

\( k° = 79° \)

Answer: 79