In the given figure, ABCD is a square. Angle DEC = 75 degrees. What is the value (in degrees) of angle EFA?
Show answer & explanation
Correct answer: C
Explanation
Given:
ABCD is a square, ∠DEC = 75°.
Each angle in a square measures 90°.
The sum of angles on a straight line is 180°.
In the square, the diagonal DB forms an angle of 45° with BC.
∠DEC = 75°.
Line EC forms an angle of 75° with BC.
Therefore, ∠EFA = 45° + 75° = 120°.