Name the Shaded Region

Difficulty: Medium · Topics: Discrete Mathematics, Sets, Set Operations

Express the shaded region using set operations.

graph "x":[-1.2,13.4],"y":[-4.9,9.1],"axes":false,"ink":true,"label":"Rectangle A, ellipse B and triangle C; the part of the triangle inside the rectangle but outside the ellipse is shaded","items":["type":"polygon","points":[[3.785,0.0],[7.863,0.0],[7.07,1.75],[6.97,1.763],[6.871,1.777],[6.773,1.793],[6.675,1.81],[6.578,1.828],[6.481,1.848],[6.384,1.87],[6.288,1.892],[6.193,1.916],[6.099,1.942],[6.005,1.969],[5.913,1.997],[5.821,2.027],[5.73,2.057],[5.639,2.09],[5.55,2.123],[5.462,2.158],[5.374,2.194],[5.288,2.231],[5.203,2.27],[5.119,2.31],[5.036,2.351],[4.954,2.393],[4.874,2.436]],"fill":0.55,"width":0.01,"type":"polygon","points":[[0,0],[10,0],[10,6.6],[0,6.6]],"type":"ellipse","at":[7.9,5.23],"rx":4.95,"ry":3.53,"type":"polygon","points":[[5.81,4.53],[9.58,-3.79],[2.09,-3.79]],"type":"label","at":[0.1,7.35],"text":"A","type":"label","at":[11.6,8.6],"text":"B","type":"label","at":[9.85,-4.55],"text":"C"]