Good visualization website: https://www.geogebra.org/m/Fayr3trM Disc Method: Given a function, we rotate this around the x-axis (or y-axis), creating multiple discs/circles from the start to the end of the functions. Summing up the area of these circles (recall: πr²). Volume of the Solid of Revolution, the Disc Method (cr: Blackpen Redpen) Washer Method: This is similar … Continue reading 5.14- Volume by Rotation