We use integration to solve the area under the curve right? when two line, or curves cut each other forming a shaded region in a Cartesian plane, and you just subtract the upper curve by the lower curve and integrate respect to whatever variable given with the two given x-axis points.

but my question here is, how if your region of area is surrounded by 3 curves or lines, with three sets of coordinates??

can anyone help me, though my question is alittle vague in a way, any help would be great. thank you