2012 · Q92
In the quadrilateral ABCD shown in the figure, angle DAB = angle DCX = 120 degrees. If angle ABC = 105 degrees, what is angle ADC equal to? (X is a point on the extension of BC beyond C.)
Elementary MathematicsGeometry
- A45 degrees
- B60 degrees
- C75 degrees
- D95 degrees
Explanation
Interior angle BCD = 180 - 120 = 60 degrees; angle ADC = 360 - 120 - 105 - 60 = 75 degrees.