tall
Student: The bottom area
R: bottom radius
C: perimeter of bottom surface
(1) lateral area = bottom circumference × height.
(2) Surface area = lateral area+bottom area ×2
(3) Volume = bottom area × height
(4) Volume = lateral area ÷2× radius.
10, cone: v volume
H height
Bottom region
R bottom radius
Volume = bottom area × height ÷3