A perpendicular CD is drawn to line AB from point C, angle EDB = 120 degrees. What is the degree measure

A perpendicular CD is drawn to line AB from point C, angle EDB = 120 degrees. What is the degree measure of the angles EDC and ADE

angle EDC = angle EDB – angle CDB;

Since CD is perpendicular to AB, the angle CDB = 90 °;

angle EDC = 120 ° – 90 ° = 30 °;

angle ADE = angle ADC – angle EDC; angle ADC = 90 °;

angle ADE = 90 ° – 30 ° = 60 °.