It is known that both the generatrix length and the bottom diameter of a cone are equal to 2. If a circle is cut out from its side view, the maximum area of the circle is? Such as the title
The cone is expanded into a semicircle with radius equal to 2. If the radius of the largest circle in the semicircle is 1, the area is π
Given that the diameter of the bottom of the cone is 2 and the length of the generatrix is 3, what is the side area of the cone?
Bottom circumference = 2 π r = π * diameter = 2 π
Side area = π L ^ 2 * 2 π R / 2 π L = π LR = π * 3 * (2 / 2) = 3 π
If the diameter of the generatrix and the bottom of the cone are equal to a, then the side area of the cone is______ .
The diameter of the generatrix and the bottom of the cone are equal to a, and the side area of the cone = a × π a △ 2 = 12 π A2