See how to find the surface area/volume of a cone.
2 examples and their solutions.
that has a vertex, a circle base,
and a lateral face (side face).
whose vertex and the center of the base circle
are the endpoints of the height.
Right Cone: Surface Area
A = πr2 + πrhs
= (base area) + (lateral area)
hs: slant height
→ hs = 5
A = π⋅32 + π⋅3⋅5
= 9π + 15π
V = 13πr2h
V = 13π⋅32⋅4