The outer radius refers to the distance from the center of a solid figure to its outermost edge.
Topic 8.11: 8.11 Volume with Washer Method: Revolving Around the x- or y-Axis
Outer radius cheat sheet for homework
Inner radius: The inner radius is the distance from the center of a solid figure to its innermost edge.
Surface area: Surface area is the total area that covers all sides of a three-dimensional object.
Circumference: Circumference is the distance around the outer edge of a circle or curved shape.